Karel Knížek

Publications:

  1. I. Jendrzejewska, K. Knížek, J. Kubacki, J. Goraus, T. Goryczka, E. Pietrasik, Z. Barsova, J. Jampilek, B. Witkowska-Kita
    Structure and properties of nano- and polycrystalline Mn-doped CuCr2Se4 obtained by ceramic method and grain reduction
    Mater. Res. Bull. 137 (2021) 111174(1) - 111174(13).

  2. M. Pashchenko, P. Veverka, T. Kmječ, O. Kaman, L. Kubíčková, J. Kohout, M. Klementová, O. Kravchuk, A. Vakula, S. Tarapov, J. Hejtmánek, K. Knížek
    Magnetic, FMR and Mössbauer studies of greigite nanoparticles
    J. Alloy. Compd. 857 (2021) 157569(1) - 157569(10).

  3. P. Baláž, M. Baláž, E. Dutková, M. Hegedus, M. Rajňák, K. Knížek, J. Hejtmánek, J. Navrátil, M. Achimovičová and J. Briančin
    Magnetization as an Effective Tool for Kinetics Evaluation in Mechanochemical Synthesis of Chalcopyrite CuFeS2
    Acta Phys. Polon. A 137 (2020) 647 - 649.

  4. P. Baláž, E. Dutková, P. Levinský, N. Daneu, L. Kubíčková, K. Knížek, M. Baláž, J. Navrátil, J. Kašparová, V. Ksenofontov, A. Möller, J. Hejtmánek
    Enhanced thermoelectric performance of chalcopyrite nanocomposite via co-milling of synthetic and natural minerals
    Mater. Lett. 275 (2020) 128107(1) - 128107(4).

  5. P. Levinský, J. hejtmánek, K. Knížek, M. Pashchenko, J. navrátil, P. Masschelein. E. Dutková, P. Baláž
    Nanograinedn- andp-Type Chalcopyrite CuFeS2Prepared by Mechanochemical Synthesis and Sintered by SPS
    Acta Phys. Polon. A 137 (2020) 904 - 907.

  6. J. Navrátil, P. Levinský, J. Hejtmánek, M. Pashchenko, K. Knížek, L. Kubíčková, T. Kmječ, Č. Drašar
    Peculiar Magnetic and Transport Properties of CuFeS2: Defects Playa Key Role
    J. Phys. Chem. C 124 (2020) 20773 - 20783.

  7. H. Němec, C. Kadlec, V. Goian, F. Borodavka, V. Železný, M. Kempa, K. Knížek, J. Hejtmánek, J. Buršík, M. Soroka
    Metal-insulator transition in (Pr,Y)0.7Ca0.3CoO3 in the far-infrared spectral region
    Phys. Rev. B 102 (2020) 195105(1) - 195105(13).

  8. K. Knížek, P. Levinský and J. Hejtmánek
    LDA+U Calculation of Electronic and Thermoelectric Properties of Doped Tetrahedrite Cu12Sb4S13
    J. Electron. Mater. 48 (2019) 2018 - 2021.

  9. J. Stergar, Z. Jirák, P. Veverka, L. Kubíčková, T. Vrba, J. Kuličková, K. Knížek, F. Porcher, J. Kohout, O. Kaman
    Mn-Zn ferrite nanoparticles coated with mesoporous silica as core materiál for heat-triggered release of therapeutic agents
    J. Magn. Magn. Mater. 475 (2019) 429 - 435.

  10. Z. Jirák, O. Kaman, K. Knížek, P. Levinský, M. Míšek, P. Veverka, J. Hejtmánek
    High-field magnetoconductance in La-Sr manganites of FM and AFM ground states
    J. Magn. Magn. Mater. 456 (2018) 167 - 178.

  11. K. Knížek, M. Pashchenko, P. Levinský, O. Kaman, J. Houdková, P. Jiříček, J. Hejtmánek, M. Soroka, and J. Buršík
    Spin Seebeck effect in ɛ-Fe2O3 thin films with high coercive field
    J. Appl. Phys. 124 (2018) 213904(1) - 213904(8).

  12. J. Hirschner, M. Maryško, J. Hejtmánek, R. Uhrecký, M. Soroka, J. Buršík, A. Anadón, M. H. Aguirre, and K. Knížek
    Spin Seebeck effect in Y-type hexagonal ferrite thin films
    Phys. Rev. B 96 (2017) 064428(1) - 064428(8).

  13. Z. Jirák, J. Hirschner, O. Kaman, K. Knížek, P. Levinský, M. Maryško, J. Hejtmánek
    Structure and transport properties of La1−xSrxMnO3 granular ceramics
    J. Phys. D-Appl. Phys. 50 (2017) 075001(1) - 075001(15).

  14. O. Kaman, J. Kuličková, V. Herynek, J. Koktan, M. Maryško, T. Dědourková, K. Knížek, Z. Jirák
    Preparation of Mn-Zn ferrite nanoparticles and their silica-coated clusters: Magnetic properties and transverse relaxivity
    J. Magn. Magn. Mater. 427 (2017) 251 - 257.

  15. K. Knížek, Z. Jirák, O. Kaman, M. Maryško and F. Damay
    Effect of Tb3+ doping in mixed-valence manganites and cobaltites
    J. Phys.-Condens. Mat. 29 (2017) 405802(1) - 405802(9).

  16. J. Koktan, G. Goglio, J. Hejtmánek, Z. Jirák, K. Knížek, J. Kuličková, M. Maryško, O. Kaman
    Magnetoconductivity of the La1-xSrxMnO3@TiO2 Nanocomposite
    IEEE Trans. Magn. 53 (2017) 8109606(1) - 8109606(6).

  17. P. Veverka, O. Kaman, K. Knížek, P. Novák, M. Maryško, Z. Jirák
    Magnetic properties of rare-earth-doped La0.7Sr0.3MnO3
    J. Phys.-Condens. Mat. 29 (2017) 035803(1) - 035803(9).

  18. P. Brázda, L. Palatinus, J. Drahokoupil, K. Knížek, J. Buršík
    Calcium-induced cation ordering and large resistivity decrease in Pr0.3CoO2
    J. Phys. Chem. Solids 96-97 (2016) 10 - 16.

  19. O. Kaman, J. Hejtmánek, Z. Jirák, K. Knížek, M. Maryško, P. Novák, S. Vratislav
    Effects of Tb3+ dopants in the La1-xSrxMnO3 bulk and nanoparticle ferromagnets
    J. Phys.-Condens. Mat. 28 (2016) 206001(1) - 206001(8).

  20. H. Němec, K. Knížek, Z. Jirák, J. Hejtmánek, M. Soroka, J. Buršík
    Charge transport in thin layer NaxCoO2 (x ∼ 0.63) studied by terahertz spectroscopy
    J. Phys.-Condens. Mat. 28 (2016) 355601(1) - 355601(6).

  21. J. Buršík M. Soroka, K. Knížek, J. Hirschner, P. Levinský, J. Hejtmánek
    Oriented thin films of Na0.6CoO2 and Ca3Co4O9 deposited by spin-coating method on polycrystalline substrate
    Thin Solid Films 603 (2016) 400 - 403.

  22. P. Zemenová, R. Král, K. Nitsch, K. Knížek, A. Cihlář, A. Bystřický
    Characterization and crystallization kinetics of Er-doped Li2O-Y2O3-P2O5 glass studied by non-isothermal DSC analysis
    J. Therm. Anal. Calorim. 125 (2016) 1431 - 1437.

  23. P. Brázda, L. Palatinus, M. Klementová, J. Buršík, K. Knížek
    Mapping of reciprocal space of La0.30CoO2 in 3D: Analysis of superstructure diffractions and intergrowths with Co3O4
    J. Solid State Chem. 227 (2015) 30 - 34.

  24. K. Knížek
    LDA + U calculation of electronic and thermoelectric properties of doped CuCoO2
    Phys. Rev. B 91 (2015) 075125(1) - 075125(8).

  25. K. Knížek, Z. Jirák, J. Hejtmánek, P. Brázda, J. Buršík, M. Soroka, P. Beran
    Structural study of layered cobaltate Lax/3CoO2 (x ~ 1) at temperatures up to 800 K
    J. Solid State Chem. 229 (2015) 160 - 163.

  26. K. Knížek, P. Novák, Z. Jirák, J. Hejtmánek, M. Maryško, J. Buršík
    Magnetism and transport properties of layered rare-earth cobaltates Ln0.3CoO2
    J. Appl. Phys. 117 (2015) 17B706(1) - 17B706(4).

  27. P. Novák, K. Knížek, Z. Jirák, J. Buršík
    The calculation of rare-earth levels in layered cobaltates Rx/3CoO2 (x≦1)
    J. Magn. Magn. Mater. 381 (2015) 145 - 150.

  28. J. Hejtmánek, K. Knížek, V. Švejda, P. Horna and M. Sikora
    Test System for Thermoelectric Modules and Materials
    J. Electron. Mater. 43 (2014) 3726 - 3732.

  29. Z. Jirak, J. Hejtmanek, K. Knizek, P. Novak, E. Santava, H. Fujishiro
    Magnetism of perovskite cobaltites with Kramers rare-earth ions
    J. Appl. Phys. 115 (2014) 17E118 (1) - 17E118 (3).

  30. K. Knizek, Z. Jirak, J. Hejtmanek, M. Veverka, O. Kaman, M. Marysko, E. Santava, and G. Andre
    Effect of Ising-type Tb3+ions on the low-temperature magnetism of La, Ca cobaltite
    J. Phys.-Condens. Mat. 26 (2014) 116003(1) - 116003(9).

  31. K. Knížek, Z. Jirák, P. Novák, C. de la Cruz
    Non-collinear magnetic structures of TbCoO3 and DyCoO3
    Solid State Sci. 28 (2014) 26 - 30.

  32. M. Maryško, J. Hejtmánek, Z. Jirák, O. Kaman, K. Knížek
    Terbium induced glassy magnetism in La,Ca-based cobaltites
    J. Appl. Phys. 115 (2014) 17E103(1) - 17E103(3).

  33. Tomoyuki Naito, Hiroyuki Fujishiro, Terukazu Nishizaki, Norio Kobayashi, J. Hejtmánek, K. Knížek and Z. Jirák
    Suppression of the metal-insulator transition by magnetic field in (Pr1-yYy)0.7Ca0.3CoO3 (y=0.0625)
    J. Appl. Phys. 115 (2014) 233914(1) - 233914(5).

  34. P. Novák, J. Kuneš, K. Knížek
    Crystal field of rare earth impurities in LaF3
    Opt. Mater. 37 (2014) 414 - 418.

  35. P. Novák, V. Nekvasil, K. Knížek
    Crystal field and magnetism with Wannier functions: Orthorhombic rare-earth manganites
    J. Magn. Magn. Mater. 358-359 (2014) 228 - 232.

  36. M. Veverka, K. Závěta, O. Kaman, P. Veverka, K. Knížek, E. Pollert, M. Burian, P. Kašpar
    Magnetic heating by silica-coated Co–Zn ferrite particles
    J. Phys. D-Appl. Phys. 47 (2014) 065503(1) - 065503(11).

  37. J. Buršík, R. Kužel, K. Knížek, I. Drbohlav
    Oriented Y-type hexagonal ferrite thin films prepared by chemical solution deposition
    J. Solid State Chem. 203 (2013) 100 - 105.

  38. H. Fujishiro, T. Naito, D. Takeda, N. Yoshida, T. Watanabe, K. Nitta, J. Hejtmánek, K. Knížek, and Z. Jirák
    Simultaneous valence shift of Pr and Tb ions at the spin-state transition in (Pr1-yTby)0.7Ca0.3CoO3
    Phys. Rev. B 87 (2013) 155153(1) - 155153(7).

  39. J. Hejtmánek, Z. Jirák, O. Kaman, K. Knížek, E. Šantavá, K. Nitta, T. Naito, H. Fujishiro
    Phase transition in Pr0.5Ca0.5CoO3 and related cobaltites
    Eur. Phys. J. B 86 (2013) 305(1) - 305(8).

  40. Z. Jirák, J. Hejtmánek, K. Knížek, M. Maryško, P. Novák, E. Šantavá, T. Naito, H. Fujishiro
    Ground-state properties of the mixed-valence cobaltites Nd0.70Sr0.3CoO3, Nd0.7Ca0.3.CoO3 and Pr0.7.Ca0.3CoO3
    J. Phys.-Condens. Mat. 25 (2013) 216006(1) - 216006(12).

  41. J. Kaštil, J. Kamarád, K. Knížek, Z. Arnold, P. Javorský
    Peculiar magnetic properties of Er conditioned Ni43Co7Mn31Ga19 at ambient and hydrostatic pressures
    J. Alloy. Compd. 565 (2013) 134 - 138.

  42. K. Knížek, J. Hejtmánek, M. Maryško, P. Novák, E. Šantavá, Z. Jirák, T. Naito, H. Fujishiro, C. de la Cruz
    Spin-state crossover and low-temperature magnetic state in yttrium-doped Pr0.7Ca0.3CoO3
    Phys. Rev. B 88 (2013) 224412(1) - 224412(8).

  43. D. P. Kozlenko, N. T. Dang, S. E. Kichanov, E. V. Lukin, K. Knížek, Z. Jirák, L. S. Dubrovinsky, V. I. Voronin and B. N. Savenko
    Pressure-induced structural transformations, orbital order and antiferromagnetism in La0.75Ca0.25MnO3
    Eur. Phys. J. B 86 (2013) 360(1) - 360(8).

  44. Z. Németh, A. Szabó, K. Knížek, M. Sikora, R. Chernikov, N. Sas, C. Bogdán, D. L. Nagy, G. Vankó
    Microscopic origin of the magnetoelectronic phase separation in Sr-doped LaCoO3
    Phys. Rev. B 88 (2013) 035125(1) - 035125(9).

  45. P. Novák, K. Knížek, J. Kuneš
    Crystal field parameters with Wannier functions: Application to rare-earth aluminates
    Phys. Rev. B 87 (2013) 205139(1) - 205139(7).

  46. P. Novák, K. Knížek, M. Maryško, Z. Jirák and J. Kuneš
    Crystal field and magnetism of Pr3+ and Nd3+ ions in orthorhombic perovskites
    J. Phys.-Condens. Mat. 25 (2013) 4460001(1) - 4460001(8).

  47. Pavel Žvátora, Miroslav Veverka, Pavel Veverka, Karel Knížek, Karel Závěta, Emil Pollert, Vladimír Král, Graziella Goglio, Etienne Duguet, Ondřej Kaman
    Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites
    J. Solid State Chem. 204 (2013) 373 - 379.

  48. H. Fujishiro, T. Naito, S. Ogawa, N. Yoshida, K. Nitta, J. Hejtmánek, K. Knížek, and Z. Jirák
    Valence Shift of Pr Ion from 3+ to 4+ in (Pr1-yYy)..0.7Ca0.3CoO3 Estimated by X-Ray Absorption Spectroscopy
    J. Phys. Soc. Jpn. 81 (2012) 064709(1) - 064709(5).

  49. J. Hejtmánek, K. Knížek, M. Maryško, Z. Jirák, D. Sedmidubský, O. Jankovský, Š. Huber, P. Masschelein, B. Lenoir
    Magnetic and magnetotransport properties of misfit cobaltate Ca3Co3.93O9+δ
    J. Appl. Phys. 111 (2012) 07D715(1) - 07D715(3).

  50. K. Knížek, J. Hejtmánek, M. Maryško, Z. Jirák, J. Buršík
    Stabilization of the high-spin state of Co3+ in LaCo1-xRhxO3
    Phys. Rev. B 85 (2012) 134401(1) - 134401(7).

  51. K. Knížek, Z. Jirák, J. Hejtmánek, M. Maryško, J. Buršík
    Structure and properties of novel cobaltates Ln0.3CoO2 (Ln = La, Pr, and Nd)
    J. Appl. Phys. 111 (2012) 07D707(1) - 07D707(3).

  52. M. Maryško, Z. Jirák, J. Hejtmánek and K. Knížek
    Glassy ferromagnetism and phase separation in Pr0.5Ca0.5CoO3
    J. Appl. Phys. 111 (2012) 07E110(1) - 07E110(3).

  53. J. Buršík, I. Drbohlav, Z. Frait, K. Knížek, R. Kužel, K. Kouřil
    Oriented SrFe12O19 thin films prepared by chemical solution deposition
    J. Solid State Chem. 184 (2011) 3085 - 3094.

  54. M. Dlouhá, J. Hejtmánek, Z. Jirák, K. Knížek, M. Veverka, S. Vratislav
    Structure and Electric Transport in LaCo0.67Cu0.33O3
    J. Superconductivity and Novel Magnetism 24 (2011) 747 - 751.

  55. T. Gbur, V. Čuba, V. Múčka, M. Nikl, K. Knížek, M. Pospíšil, I. Jakubec
    Photochemical preparation of ZnO nanoparticles
    J. Nanopart. Res. 13 (2011) 4529 - 4537.

  56. V. Goian, S. Kamba, D. Nuzhnyy, P. Vaněk, M. Kempa, V. Bovtun, K. Knížek, J. Prokleška, F. Borodavka, M. Ledinský, I. Gregora
    Dielectric, magnetic and structural properties of novel multiferroic Eu0.5Ba0.5TiO3 ceramics
    J. Phys.-Condens. Mat. 23 (2011) 025904(1) - 025904(7).

  57. O. Kaman, P. Veverka, Z. Jirák, M. Maryško, K. Knížek, M. Veverka, P. Kašpar, M. Burian, V. Šepelák, E. Pollert
    The magnetic and hyperthermia studies of bare and silica-coated La0.75Sr0.25MnO3 nanoparticles
    J. Nanopart. Res. 13 (2011) 1237 - 1252.

  58. K. Knížek, J. Hejtmánek, M. Maryško, E. Šantavá, Z. Jirák, J. Buršík, K. Kirakci, P. Beran
    Structure and properties of a novel cobaltate La0.30CoO2
    J. Solid State Chem. 184 (2011) 2231 - 2237.

  59. M. Maryško, Z. Jirák, K. Knížek, P. Novák, J. Hejtmánek, T. Naito, H. Sasaki, and H. Fujishiro
    Thermally and field driven spin-state transitions in (Pr(1-y)Yy)Ca0.3CoO3
    J. Appl. Phys. 109 (2011) 07E127-1 - 07E127-3.

  60. M. Veverka, Z. Jirák, O. Kaman, K. Knížek, M. Maryško, E. Pollert, K. Závěta, A. Lančok, M. Dlouhá and S. Vratislav
    Distribution of cations in nanosize and bulk Co-Zn ferrites
    Nanotechnology 22 (2011) 345701(1) - 345701(7).

  61. M. Dlouhá, J. Hejtmánek, Z. Jirák, K. Knížek, P. Tomeš, S. Vratislav
    Antiferromagnetic ordering in the double perovskites La2-xSrxCoRuO6
    J. Magn. Magn. Mater. 322 (2010) 1189 - 1191.

  62. J. Hejtmánek, E. Šantavá, K. Knížek, M. Maryško, and Z. Jirák, T. Naito, H. Sasaki, and H. Fujishiro
    Metal-insulator transition and the Pr3+/Pr4+ valence shift in (Pr1-yYy)0.7Ca0.3CoO3
    Phys. Rev. B 82 (2010) 165107(1) - 165107(7).

  63. Z. Jirák, E. Hadová, O. Kaman, K. Knížek, M. Maryško, E. Pollert, M. Dlouhá, S. Vratislav
    Ferromagnetism versus charge ordering in the Pr0.5Ca0.5MnO3 and La0.5Ca0.5MnO3 nanocrystals
    Phys. Rev. B 81 (2010) 024403(1) - 024403(8).

  64. S. Kamba, V. Goian, M. Savinov, E. Buixaderas, D. Nuzhnyy, M. Maryško, M. Kempa, V. Bovtun, J. Hlinka, K. Knížek, P. Vaněk, P. Novák, J. Buršík, Y. Hiraoka, T. Kimura, K. Kouřil, H. Štěpánková
    Dielectric, magnetic and lattice dynamics properties of Y-type hexaferrite Ba0.5Sr1.5Zn2Fe12O22: Comparison of ceramics and single crystals
    J. Appl. Phys. 107 (2010) 104109(1) - 104109(7).

  65. K. Knížek, J. Hejtmánek, P. Novák, Z. Jirák
    Charge transfer, valence, and the metal-insulator transition in Pr0.5Ca0.5CoO3
    Phys. Rev. B 81 (2010) 155113(1) - 155113(5).

  66. K. Knížek, Z. Jirák, J. Hejtmánek, P. Novák
    Transition from the diamagnetic insulator to ferromagnetic metal in La1-xSrxCoO3
    J. Magn. Magn. Mater. 322 (2010) 1221 - 1223.

  67. K. Kouřil, V. Chlan, H. Štěpánková, P. Novák, K. Knížek, J. Hybler, T. Kimura, Y. Hiraoka, J. Buršík
    Hyperfine interactions in magnetoelectric hexaferrite system
    J. Magn. Magn. Mater. 322 (2010) 1243 - 1245.

  68. K. Kouřil, V. Chlan, H. Štěpánková, A. Telfah, P. Novák, K. Knížek, Y. Hiraoka, T. Kimura
    Distribution of Zn in Magnetoelectric Y-Type Hexaferrite
    Acta Phys. Polon. A 118 (2010) 732 - 733.

  69. M. Maryško, R. Fajgar, J. Šubrt, N. Murafa, K. Knížek
    Magnetic properties of FeCo nanoparticles encapsulated in carbon
    J. Phys.: Conf. Ser. 200 (2010) 1 - 5.

  70. M. Maryško, Z. Jirák, K. Knížek, C. Autret-Lambert
    Static and dynamic behavior of the cluster phase in LaMn0.6Co0.4O3
    J. Magn. Magn. Mater. 322 (2010) 1392 - 1395.

  71. P. Novák, V. Chlan, K. Knížek
    Giant Magnetoelectricity in Aluminium Substituted Y-Hexaferrites
    Acta Phys. Polon. A 118 (2010) 723 - 724.

  72. V. Procházka, Cz. Kapusta, M. Sikora, H. Štěpánková, V. Chlan, K. Knížek, Z. Jirák
    Local surrounding of Mn in LaMn1-xCoxO3 compounds by means of EXAFS on Mn-K
    J. Magn. Magn. Mater. 322 (2010) 1198 - 1200.

  73. K. Z. Rushchanskii, S. Kamba, V. Goian, P. Vaněk, M. Savinov, J. Prokleška, D. Nuzhnyy, K. Knížek, F. Laufek, S. Eckel, S. K. Lamoreaux, A. O. Sushkov, M. Ležaič, N. A. Spaldin
    A multiferroic material to search for the permanent electric dipole moment of the electron
    Nature Mater. 9 (2010) 649 - 654.

  74. P. Tomeš, A. Weidenkaff, J. Hejtmánek, K. Knížek
    On the physical properties of Sr1-xNaxRuO3 (x = 0 - 0.19)
    Solid State Sci. 12 (2010) 1112 - 1120.

  75. M. Veverka, P. Veverka, Z. Jirák, O. Kaman, K. Knížek, M. Maryško, E. Pollert, K. Závěta
    Synthesis and magnetic properties of Co1-xZnxFe2O4+γ nanoparticles as materials for magnetic fluid hyperthermia
    J. Magn. Magn. Mater. 322 (2010) 2386 - 2389.

  76. O. Kaman, E. Pollert, P. Veverka, M. Veverka, E. Hadová, K. Knížek, M. Maryško, P. Kašpar, M. Klementová, V. Grünwaldová, S. Vasseur, R. Epherre, S. Mornet, G. Goglio, E. Duguet
    Silica encapsulated manganese perovskite nanoparticles for magnetically induced hyperthermia without the risk of overheating
    Nanotechnology 20 (2009) 275610(1) - 275610(7).

  77. K. Knížek, J. Hejtmánek, Z. Jirák, P. Tomeš, P. Henry, G. André
    Neutron diffraction and heat capacity studies of PrCoO3 and NdCoO3
    Phys. Rev. B 79 (2009) 134103(1) - 134103(7).

  78. K. Knížek, Z. Jirák, J. Hejtmánek, P. Novák, Wei Ku,
    GGA+U calculations of correlated spin excitations in LaCoO3
    Phys. Rev. B 79 (2009) 014430(1) - 014430(8).

  79. Logvinovich D., Hejtmánek J., Knížek K., Maryško M., Homazava N., Tomeš P., Aguiar R., Ebbinghaus S. G., Reller A., Weidenkaff A.
    On the magnetism, thermal- and electrical transport of SrMoO2N
    J. Appl. Phys. 105 (2009) 023522(1) - 023522(6).

  80. J. Hejtmánek, Z. Jirák, K. Knížek, M. Maryško, M. Veverka, C. Autret
    Valence and spin states in perovskites LaCo0.95M0.05O3 (M = Mg, Ga, Ti)
    J. Magn. Magn. Mater. 320 (2008) 92 - 95.

  81. J. Hejtmánek, K. Knížek, M. Maryško, Z. Jirák, D. Sedmidubský, Z. Sofer, V. Peřina, H. Hardtdegen, C. Buchal
    On the magnetic properties of Gd implanted GAN
    J. Appl. Phys. 103 (2008) 07D107(1) - 07D107(3).

  82. Z. Jirák, J. Hejtmánek, K. Knížek, M. Veverka
    Electrical resistivity and thermopower measurements of the hole- and electron-doped cobaltites LnCoO3
    Phys. Rev. B 78 (2008) 014432(1) - 014432(8).

  83. M. Kašpar, P. Bílková, A. Bubnov, V. Hamplová, V. Novotná, M. Glogarová, K. Knížek, D. Pociecha
    New chlorine substituted liquid crystals possessing frustrated TGBA and SmQ phases
    Liq. Cryst. 35 (2008) 641 - 651.

  84. K. Knížek, Z. Jirák, J. Hejtmánek, P. Henry, G. André
    Structural anomalies, spin transitions and charge disproportionation in LnCoO3
    J. Appl. Phys. 103 (2008) 07B703(1) - 07B703(3).

  85. V. Procházka, H. Štěpánková, B. Sedlák, Cz. Kapusta, K. Knížek, Z. Jirák, J. Englich, R. Řezníček
    NMR study of LaMn1-xCoxO3 perovskites
    J. Magn. Magn. Mater. 320 (2008) 12 - 15.

  86. M. Sikora, K. Knížek, Cz. Kapusta, P. Glatzel
    Evolution of charge and spin state of transition metals in the LaMn1-xCoxO3 perovskite series
    J. Appl. Phys. 103 (2008) 07C907(1) - 07C907(3).

  87. P. Tomeš, J. Hejtmánek, K. Knížek
    On the La2-xSrxCoRuO6 double perovskites: Crystal structure, magnetic properties and transport.
    Solid State Sci. 10 (2008) 486 - 490.

  88. R. Vidya, P. Ravindran, K. Knížek, A. Kjekshus, H. Fjellvåg
    Density Functional Theory Studies of Spin, Charge, and Orbital Ordering in YBaT2O5 (T = Mn, Fe, Co).
    Inorg. Chem. 47 (2008) 6608 - 6620.

  89. V. Bovtun, S. Kamba, S. Veljko, D. Nuzhnyy, K. Knížek, M. Savinov, J. Petzelt
    Relaxor-like behavior of a new lead-free tetragonal tungsten bronze Sr2LaTi2Nb3O15 ceramics
    J. Appl. Phys. 101 (2007) 054115(1) - 054115(6).

  90. A. Chichev, M. Dlouhá, S. Vratislav, J. Hejtmánek, Z. Jirák, K. Knížek, M. Maryško
    Neutron diffraction study of Pr0.5Ca0.5CoO3-\gamma (γ=0 and 0.07)
    Z. Kristallogr. 26 (2007) 435 - 440.

  91. A. Chichev, J. Hejtmánek, Z. Jirák, K. Knížek, M. Maryško, M. Dlouhá, S. Vratislav
    The low-temperature phase separation in Pr0.5Ca0.5CoO3
    J. Magn. Magn. Mater. 316 (2007) e728

  92. S. Kamba, D. Nuzhnyy, P. Vaněk, M. Savinov, K. Knížek, Z. Shen, E. Šantavá, K. Máca, M. Sadowski, J. Petzelt
    Magnetodielectric effect and optic soft mode behaviour in quantum paraelectric EuTiO3 ceramics
    Europhys. Lett. 80 (2007) 27002(1) - 27002(6).

  93. M. Miclau, J. Hejtmánek, R. Retoux, K. Knížek, Z. Jirák, R. Fresard, A. Maignan, S. Hebert, M. Hervieu, and C. Martin
    Structural and Magnetic Transitions in CaMn1-xWxO3
    Chem. Mater. 19 (2007) 4243 - 4251.

  94. P. Novák, K. Knížek
    Exchange interaction and conductivity in ferroelectric hexaferrite
    J. Magn. Magn. Mater. 316 (2007) e587

  95. P. Novák, K. Knížek, J. Rusz
    Magnetism in the magnetoelectric hexaferrite system (Ba1-xSrx)2Zn2Fe12O22
    Phys. Rev. B 76 (2007) 024432-1 - 024432-6.

  96. E. Pollert, K. Knížek, M. Maryško, P. Kašpar, S. Vasseur, E. Duguet
    New Tc-tuned magnetic nanoparticles for self-controlled hyperthermia
    J. Magn. Magn. Mater. 316 (2007) 122 - 125.

  97. V. Procházka, Cz. Kapusta, M. Sikora, D. Zajac, K. Knížek, Z. Jirák, H. Štěpánková
    EXAFS study of LaMn1-xCoxO3 compounds
    J. Magn. Magn. Mater. 310 (2007) e197

  98. P. Veverka, K. Knížek, E. Pollert, J. Boháček, S. Vasseur, E. Duguet, J. Portier
    Strontium ferrite nanoparticles synthesized in presence of polyvinylalcohol: Phase composition, microstructural and magnetic properties
    J. Magn. Magn. Mater. 309 (2007) 106 - 112.

  99. M. Veverka, P. Veverka, O. Kaman, A. Lančok, K. Závěta, E. Pollert, K. Knížek, J. Boháček, M. Beneš, P. Kašpar, E. Duguet, S. Vasseur
    Magnetic heating by cobalt ferrite nanoparticles
    Nanotechnology 18 (2007) 345704(1) - 345704(7).

  100. V. Chichev , M. Dlouhá , S. Vratislav , K. Knížek , J. Hejtmánek , M. Maryško , M. Veverka , Z. Jirák , O. Golosova , P. Kozlenko , and N. Savenko
    Structural, magnetic, and transport properties of the single-layered perovskites La2-xSrxCoO4 (x=1.0-1.4)
    Phys. Rev. B 74 (2006) 134414(1) - 134414(8).

  101. M. Giot, P. Beran, O. Perez, S. Malo, M. Hervieu, B. Raveau, M. Nevřiva, K. Knížek, P. Roussel
    Bi1-xCaxMnO3 (x=0.4 and 0.45): X-ray single-crystal and electron microscopy study
    Chem. Mater. 18 (2006) 3225 - 3236.

  102. J. Hejtmánek, M. Veverka, K. Knížek, H. Fujishiro, S. Hebert, Y. Klein, A. Maignan, C. Bellouard, B. Lenoir,
    Cobaltites as perspective thermoelectrics
    Mat. Res. Soc. Symposium Proceedings 886, 35 (2006)

  103. S. Honda, T. Mates, K. Knížek, M. Ledinský, A. Fejfar, J. Kočka, T. Yamazaki, Y. Uraoka, T. Fuyuki
    Hydrogenation of polycrystalline silicon thin films
    Thin Solid Films 501 (2006) 144 - 148.

  104. K. Knížek , Z. Jirák , J. Hejtmánek , and P. Novák
    Character of the excited state of the Co3+ ion in LaCoO3
    J. Phys.-Condens. Mat. 18 (2006) 3285 - 3297.

  105. K. Knížek , Z. Jirák , J. Hejtmánek , M. Veverka , M. Maryško , C. Hauback , and H. Fjellvag
    Structure and physical properties of YCoO3 at temperatures up to 1000 K
    Phys. Rev. B 73 (2006) 214443(1) - 214443(6).

  106. K. Knížek , P. Novák , and M. Kupferling
    Electronic structure and conductivity of ferroelectric hexaferrite: Ab initio calculations
    Phys. Rev. B 73 (2006) 153103(1) - 153103(4).

  107. E. Pollert, K. Knížek, M. Maryško, K. Závěta, A. Lančok, J. Boháček, D. Horák, M. Babič
    Magnetic poly(glycidyl methacrylate) microspheres containing maghemite prepared by emulsion polymerization
    J. Magn. Magn. Mater. 306 (2006) 241 - 247.

  108. D. Rybicki, M. Sikora, Cz. Kapusta, P. C. Riedi, Z. Jirák, K. Knížek, M. Maryško, E. Pollert, P. Veverka
    A 55Mn NMR study of the La0.75Sr0.25MnO3 nanoparticles
    phys. status solidi c 3 (2006) 155 - 158.

  109. M. Sikora , C. Kapusta , K. Knížek , Z. Jirák , C. Autret , M. Borowiec , J. Oates , V. Procházka , D. Rybicki , and D. Zajac
    X-ray absorption near-edge spectroscopy study of Mn and Co valence states in LaMn1-xCoxO3 (x=0-1)
    Phys. Rev. B 73 (2006) 94426(1) - 94426(5).

  110. N. Tomašovičová, K. Knížek, M. Veverka
    Temperature dependence of the infrared properties of Hg-Ba-Cu-O high-temperature superconductor
    Physica B 378-380 (2006) 455 - 456.

  111. S. Vasseur , E. Duguet , J. Portier , G. Goglio , S. Mornet , E. Hadová , K. Knížek , M. Maryško , P. Veverka , and E. Pollert
    Lanthanum manganese perovskite nanoparticles as possible in vivo mediators for magnetic hyperthermia
    J. Magn. Magn. Mater. 302 (2006) 315 - 320.

  112. C. Autret, J. Hejtmánek, K. Knížek, M. Maryško, Z. Jirák, M. Dlouhá and S. Vratislav
    Electric transport and magnetic properties of perovskites LaMn1-xCoxO3 up to 900 K
    J. Phys.-Condens. Mat. 17 (2005) 1601 - 1616.

  113. K. Knizek , Z. Jirak, J. Hejtmanek, M. Veverka, M. Marysko, G. Maris, T. M. Palstra
    Structural anomalies associated with the electronic and spin transitions in LnCoO(3)
    Eur. Phys. J. B 47 (2005) 213 - 220.

  114. K. Knizek , P. Novak , and Z. Jirak
    Spin state of LaCoO3: Dependence on CoO6 octahedra geometry
    Phys. Rev. B 71 (2005) 54420(1) - 54420(6).

  115. M. Kupferling , P. Novak , K. Knizek , W. Pieper , R. Grossinger , G. Wiesinger , and M. Reissner
    Magnetism in La substituted Sr hexaferrite
    J. Appl. Phys. 97 (2005) 10F309(1) - 10F309(3).

  116. P. Novák, K. Knížek, M. Küpferling, R. Grössinger, M. W. Pieper
    Magnetism of mixed valence (LaSr) hexaferrites
    Eur. Phys. J. B 43 (2005) 509 - 515.

  117. V. Novotná, V. Hamplová, M. Kašpar, M. Glogarová, K. Knížek, S. Diele, G. Pelzl, Ch. Jones, D. Coleman, N. A. Clark
    The B2-B7 phase transition in symmetrical bent-shaped mesogens with methoxy substitution.
    Liq. Cryst. 32 (2005) 967 - 975.

  118. J. Hejtmanek , Z. Jirak , K. Knizek , M. Marysko , M. Veverka , and H. Fujishiro
    Magnetism, structure and transport of Y1-xCaxCoO3 and La1-xBaxCoO3
    J. Magn. Magn. Mater. 272 (2004) E283

  119. J. Hejtmanek , Z. Jirak , K. Knizek , E. Pollert , C. Martin , and A. Maignan
    Phase competition in Pr0.8-xLaxNa0.2Mn1-yMeyO3
    J. Magn. Magn. Mater. 272 (2004) E287

  120. N. Hudakova , K. Knizek , and J. Hejtmanek
    The infrared properties of Bi2Y0.1Sr1.9CaCu2O8+delta superconductor
    Physica C 406 (2004) 58 - 62.

  121. Z. Jirák, J. Hejtmánek, K. Knížek, S. Krupička, M. Maryško
    Effect of Cr doping in charge ordered Y1-xCaxMnO3 (x~0.5)
    J. Magn. Magn. Mater. 272-276 (2004) E1029

  122. K. Knížek, J. Hejtmánek, Z. Jirák, C. Martin, M. Hervieu, B. Raveau, G. André, F. Bourée
    Structure, magnetism and transport properties of Pr1-xSrxMnO3 (x = 0.45 - 0.75) up to 1200 K
    Chem. Mater. 16 (2004) 1104 - 1110.

  123. K. Knizek , Z. Jirak , J. Hejtmanek , M. Marysko , C. Martin , A. Maignan , and M. Hervieu
    The nanoscopic separation of magnetic phases in Cr-doped manganites Pr0.44Sr0.56MnO3
    J. Magn. Magn. Mater. 272 (2004) E1085

  124. E. Pollert , J. Hejtmanek , Z. Jirak , K. Knizek , M. Marysko , P. Doumerc , C. Grenier , and J. Etourneau
    Influence of the structure on electric and magnetic properties of La0.8Na0.2Mn1-xCoxO3 perovskites
    J. Solid State Chem. 177 (2004) 4564 - 4568.

  125. M. Rodová, A. Cihlář, K. Knížek, K. Nitsch, and N. Solovieva
    Preparation and properties of Ce-doped Na-Gd phosphate glasses
    Radiat. Meas. 38 (2004) 489 - 492.

  126. J. Hejtmanek , K. Knizek , Z. Jirak , M. Hervieu , C. Martin , M. Nevriva , and P. Beran
    Ordering phenomena and transport properties of Bi1/2Sr1/2MnO3 single crystals
    J. Appl. Phys. 93 (2003) 7370 - 7372.

  127. Z. Jirak , J. Hejtmanek , K. Knizek , M. Marysko , C. Martin , A. Maignan , and M. Hervieu
    Magnetoresistive behavior of Cr-doped manganites Pr0.44Sr0.56MnO3
    J. Appl. Phys. 93 (2003) 8083 - 8085.

  128. E. Pollert , J. Hejtmanek , Z. Jirak , K. Knizek , and M. Marysko
    Influence of Co doping on properties of Pr0.8Na0.2Mn((1-y))CoyO3 perovskites
    J. Solid State Chem. 174 (2003) 466 - 470.

  129. M. Rodova, J. Brozek, K. Knizek, and K. Nitsch
    Phase transition in ternary caesium lead bromide
    J. Therm. Anal. Calorim. 71 (2003) 667 - 673.

  130. M. Dlouhá, S. Vratislav, Z. Jirák, J. Hejtmánek, K. Knížek, D. Sedmidubský
    Structure and magnetic order in Y1-xCaxMnO3 (x = 0.3 and 0.5)
    Appl. Phys. A-Mater. 74 (2002) S673

  131. Z. Jirak , J. Hejtmanek , K. Knizek , M. Marysko , E. Pollert , M. Dlouha , S. Vratislav , R. Kuzel , and M. Hervieu
    Structure and magnetism in the Pr1-xNaxMnO3 perovskites (0 <= x <= 0.2)
    J. Magn. Magn. Mater. 250 (2002) 275 - 287.

  132. K. Knizek , E. Pollert , D. Sedmidubsky , and I. Bryntse
    Mercury pressure during synthesis of the HgBa2CaCu2O6+delta superconductor
    Physica C 371 (2002) 111 - 116.

  133. P. Nemec , I. Nemec , P. Nahalkova , K. Knizek , and P. Maly
    Ammonia-free chemical bath deposition of CdS films: tailoring the nanocrystal sizes
    J. Cryst. Growth 240 (2002) 484 - 488.

  134. D. Sykorova , O. Smrckova , K. Rubesova , and K. Knizek
    Influence of B, Al, Ga, In on the composition of Bi(Pb)SrCaCuO system
    Physica B 321 (2002) 295 - 297.

  135. I. Pelant , P. Fojtik , K. Luterova , J. Kocka , K. Knizek , and J. Stepanek
    Room temperature electric field induced crystallization of wide band gap hydrogenated amorphous silicon
    Thin Solid Films 383 (2001) 101 - 103.

  136. Z. Jirak , J. Hejtmanek , K. Knizek , M. Marysko , V. Sima , and R. Sonntag
    Ferromagnetic-antiferromagnetic transition in tetragonal La0.50Sr0.50MnO3
    J. Magn. Magn. Mater. 217 (2000) 113 - 119.

  137. K. Knizek , M. Veverka , E. Pollert , and I. Bryntse
    Preparation and doping of the HgBa2-xSrxCuO4+delta series
    Physica C 330 (2000) 27 - 32.

  138. D. Sedmidubský, J. Leitner, K. Knížek, A. Strejc, M. Nevřiva
    Phase Relations in Hg-Ba-Ca-Cu-O System
    Physica C 341-348 (2000) 509 - 510.

  139. D. Sedmidubský, J. Leitner, K. Knížek, A. Strejc, M. Veverka
    Phase equilibria in the Hg-Ba-Cu-O system
    Physica C 329 (2000) 191 - 197.

  140. K. Knizek , M. Veverka , and E. Pollert
    Preparation of Hg0.8Cr0.2Ba2CuO4+delta under controlled oxygen and mercury partial pressures
    Physica C 311 (1999) 303 - 309.

  141. K. Knížek, M. Veverka, E. Pollert, I. Bryntse, C. Michel, B. Raveau
    Strontium substitution for Barium in Mercury Superconductors
    J. Low Temp. Phys. 117 (1999) 879 - 883.

  142. K. Knizek , M. Daturi , G. Busca , and C. Michel
    Structural, electro-magnetic and catalytic characterisation of the LaMn1-xCuxO3-delta system
    J. Mater. Chem. 8 (1998) 1815 - 1819.

  143. K. Knizek , M. Veverka , E. Hadova , J. Hejtmanek , D. Sedmidubsky , and E. Pollert
    Synthesis of HgBa2CuO4+delta by sol-gel method under controlled oxygen pressure; electron and thermal transport properties
    Physica C 302 (1998) 290 - 298.

  144. V. Šíma, E. Pollert, V. Plecháček, J. Chval, K. Knížek, L. Martini, L. Bigoni, S. Zannella
    Microstructure of the Ag/Bi(Pb)-2223 Tapes Prepared by Solid-State Reaction
    J. Supercond. 11 (1998) 253 - 268.

  145. S. Vratislav , M. Dlouha , J. Hejtmanek , Z. Jirak , and K. Knizek
    Structure properties and oxygen content in Y0.6Ca0.2Ba2Cu3Oy (y=6.03-6.89) by neutron diffraction
    Physica B 234 (1997) 928 - 930.

  146. J. Hejtmanek , Z. Jirak , K. Knizek , M. Dlouha , and S. Vratislav
    Oxygen content and superconductivity in Y0.8Ca0.2Ba2Cu3Oy (y=6.03-6.89)
    Phys. Rev. B 54 (1996) 16226 - 16233.

  147. V. Plecháček, J. Hejtmánek, D. Sedmidubský, K. Knížek, E. Pollert, Z. Janů, R. Tichý
    MAGNETIC SHIELDING AND TRAPPING PROPERTIES OF BPSCCO SUPERCONDUCTING TUBES
    IEEE Trans. Appl. Supercond. 5 (1995) 528 - 531.

  148. K. Nitsch, K. Knížek, M. Rodová
    X-ray diffraction study of lead chloride
    Solid State Commun. 91 (1994) 611 - 614.