Publications

  1. 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 Physica Polonica A 137 (2020) 904-907.
  2. 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
    Journal of Physical Chemistry C 124 (2020) 20773-20783.
  3. 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
    Physical Review B 102 (2020) 195105(1)-195105(13).
  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
    Materials Letters 275 (2020) 128107(1)-128107(4).
  5. P. Baláž, M. Baláž, E. Dutková, M. Hegedus, M. Rajňák, K. Knížek, J. Hejtmánek, J. Navrátil, M. Achimovičová, J. Briančin
    Magnetization as an Effective Tool for Kinetics Evaluation in Mechanochemical Synthesis of Chalcopyrite CuFeS2
    Acta Physica Polonica A 137 (2020) 647-649.
  6. 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
    Journal of Magnetism and Magnetic Materials 475 (2019) 429-435.
  7. K. Knížek, P. Levinský, J. Hejtmánek
    LDA+U Calculation of Electronic and Thermoelectric Properties of Doped Tetrahedrite Cu12Sb4S13
    Journal of Electronic Materials 48 (2019) 2018-2021.
  8. 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
    Journal of Magnetism and Magnetic Materials 456 (2018) 167-178.
  9. K. Knížek, M. Pashchenko, P. Levinský, O. Kaman, J. Houdková, P. Jiříček, J. Hejtmánek, M. Soroka, J. Buršík
    Spin Seebeck effect in ɛ-Fe2O3 thin films with high coercive field
    Journal of Applied Physics 124 (2018) 213904(1)-213904(8).
  10. 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
    Journal of Magnetism and Magnetic Materials 427 (2017) 251-257.
  11. Z. Jirák, J. Hirschner, O. Kaman, K. Knížek, P. Levinský, M. Maryško, J. Hejtmánek
    Structure and transport properties of La1−xSrxMnO3 granular ceramics
    Journal of Physics D: Applied Physics 50 (2017) 075001(1)-075001(15).
  12. P. Veverka, O. Kaman, K. Knížek, P. Novák, M. Maryško, Z. Jirák
    Magnetic properties of rare-earth-doped La0.7Sr0.3MnO3
    Journal of Physics: Condensed Matter 29 (2017) 035803(1)-035803(9).
  13. J. Koktan, G. Goglio, J. Hejtmánek, Z. Jirák, K. Knížek, J. Kuličková, M. Maryško, O. Kaman
    Magnetoconductivity of the La1-xSrxMnO3@TiO2 Nanocomposite
    IEEE Transactions on Magnetics 53 (2017) 8109606(1)-8109606(6).
  14. K. Knížek, Z. Jirák, O. Kaman, M. Maryško, F. Damay
    Effect of Tb3+ doping in mixed-valence manganites and cobaltites
    Journal of Physics: Condensed Matter 29 (2017) 405802(1)-405802(9).
  15. J. Hirschner, M. Maryško, J. Hejtmánek, R. Uhrecký, M. Soroka, J. Buršík, A. Anadón, M. H. Aguirre, K. Knížek
    Spin Seebeck effect in Y-type hexagonal ferrite thin films
    Physical Review B 96 (2017) 064428(1)-064428(8).
  16. P. Brázda, L. Palatinus, K. Knížek, J. Buršík
    Calcium-induced cation ordering and large resistivity decrease in Pr0.3CoO2
    Journal of Physics and Chemistry of Solids 96-97 (2016) 10-16.
  17. 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
    Journal of Physics: Condensed Matter 28 (2016) 355601(1)-355601(6).
  18. 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
    Journal of Thermal Analysis and Calorimetry 125 (2016) 1431-1437.
  19. 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.
  20. 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
    Journal of Physics: Condensed Matter 28 (2016) 206001(1)-206001(8).
  21. K. Knížek, P. Novák, Z. Jirák, J. Hejtmánek, M. Maryško, J. Buršík
    Magnetism and transport properties of layered rare-earth cobaltates Ln0.3CoO2
    Journal of Applied Physics 117 (2015) 17B706(1)-17B706(4).
  22. P. Novák, K. Knížek, Z. Jirák, J. Buršík
    The calculation of rare-earth levels in layered cobaltates Rx/3CoO2 (x≦1)
    Journal of Magnetism and Magnetic Materials 381 (2015) 145-150.
  23. 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
    Journal of Solid State Chemistry 229 (2015) 160-163.
  24. 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
    Journal of Solid State Chemistry 227 (2015) 30-34.
  25. K. Knížek
    LDA + U calculation of electronic and thermoelectric properties of doped CuCoO2
    Physical Review B 91 (2015) 075125(1)-075125(8).
  26. 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
    Journal of Physics D: Applied Physics 47 (2014) 065503(1)-065503(11).
  27. P. Novák, V. Nekvasil, K. Knížek
    Crystal field and magnetism with Wannier functions: Orthorhombic rare-earth manganites
    Journal of Magnetism and Magnetic Materials 358-359 (2014) 228-232.
  28. Z. Jirák, J. Hejtmánek, K. Knížek, P. Novák, E. Santava, H. Fujishiro
    Magnetism of perovskite cobaltites with Kramers rare-earth ions
    Journal of Applied Physics 115 (2014) 17E118 (1)-17E118 (3).
  29. K. Knížek, Z. Jirák, J. Hejtmánek, M. Veverka, O. Kaman, M. Maryško, E. Santava, G. Andre
    Effect of Ising-type Tb3+ions on the low-temperature magnetism of La, Ca cobaltite
    Journal of Physics: Condensed Matter 26 (2014) 116003(1)-116003(9).
  30. P. Novák, J. Kuneš, K. Knížek
    Crystal field of rare earth impurities in LaF3
    Optical Materials 37 (2014) 414-418.
  31. K. Knížek, Z. Jirák, P. Novák, C. de la Cruz
    Non-collinear magnetic structures of TbCoO3 and DyCoO3
    Solid State Sciences 28 (2014) 26-30.
  32. M. Maryško, J. Hejtmánek, Z. Jirák, O. Kaman, K. Knížek
    Terbium induced glassy magnetism in La,Ca-based cobaltites
    Journal of Applied Physics 115 (2014) 17E103(1)-17E103(3).
  33. Tomoyuki Naito, Hiroyuki Fujishiro, Terukazu Nishizaki, Norio Kobayashi, J. Hejtmánek, K. Knížek, Z. Jirák
    Suppression of the metal-insulator transition by magnetic field in (Pr1-yYy)0.7Ca0.3CoO3 (y=0.0625)
    Journal of Applied Physics 115 (2014) 233914(1)-233914(5).
  34. J. Hejtmánek, K. Knížek, V. Švejda, P. Horna, M. Sikora
    Test System for Thermoelectric Modules and Materials
    Journal of Electronic Materials 43 (2014) 3726-3732.
  35. H. Fujishiro, T. Naito, D. Takeda, N. Yoshida, T. Watanabe, K. Nitta, J. Hejtmánek, K. Knížek, Z. Jirák
    Simultaneous valence shift of Pr and Tb ions at the spin-state transition in (Pr1-yTby)0.7Ca0.3CoO3
    Physical Review B 87 (2013) 155153(1)-155153(7).
  36. D.P. Kozlenko, N.T.Dang, S.E.Kichanov, E.V. Lukin, K. Knížek, Z. Jirák, L.S.Dubrovinsky, V.I. Voronin, B.N. Savenko
    Pressure-induced structural transformations, orbital order and antiferromagnetism in La0.75Ca0.25MnO3
    European Physical Journal B 86 (2013) 360(1)-360(8).
  37. Pavel Žvátora, Miroslav Veverka, P. Veverka, K. Knížek, K. Závěta, Emil Pollert, Vladimír Král, Graziella Goglio, Etienne Duguet, O. Kaman
    Influence of surface and finite size effects on the structural and magnetic properties of nanocrystalline lanthanum strontium perovskite manganites
    Journal of Solid State Chemistry 204 (2013) 373-379.
  38. 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
    Journal of Physics: Condensed Matter 25 (2013) 216006(1)-216006(12).
  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
    European Physical Journal B 86 (2013) 305(1)-305(8).
  40. 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
    Physical Review B 88 (2013) 224412(1)-224412(8).
  41. P. Novák, K. Knížek, M. Maryško, Z. Jirák, J. Kuneš
    Crystal field and magnetism of Pr3+ and Nd3+ ions in orthorhombic perovskites
    Journal of Physics: Condensed Matter 25 (2013) 4460001(1)-4460001(8).
  42. J. Buršík, R. Kužel, K. Knížek, I. Drbohlav
    Oriented Y-type hexagonal ferrite thin films prepared by chemical solution deposition
    Journal of Solid State Chemistry 203 (2013) 100-105.
  43. P. Novák, K. Knížek, J. Kuneš
    Crystal field parameters with Wannier functions: Application to rare-earth aluminates
    Physical Review B 87 (2013) 205139(1)-205139(7).
  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
    Physical Review B 88 (2013) 035125(1)-035125(9).
  45. J. Kaštil, J. Kamarád, K. Knížek, Z. Arnold, P. Javorský
    Peculiar magnetic properties of Er conditioned Ni43Co7Mn31Ga19 at ambient and hydrostatic pressures
    Journal of Alloys and Compounds 565 (2013) 134-138.
  46. M. Maryško, Z. Jirák, J. Hejtmánek, K. Knížek
    Glassy ferromagnetism and phase separation in Pr0.5Ca0.5CoO3
    Journal of Applied Physics 111 (2012) 07E110(1)-07E110(3).
  47. H. Fujishiro, T. Naito, S. Ogawa, N. Yoshida, K. Nitta, J. Hejtmánek, K. Knížek, Z. Jirák
    Valence Shift of Pr Ion from 3+ to 4+ in (Pr1-yYy)..0.7Ca0.3CoO3 Estimated by X-Ray Absorption Spectroscopy
    Journal of the Physical Society of Japan 81 (2012) 064709(1)-064709(5).
  48. 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+$\delta$
    Journal of Applied Physics 111 (2012) 07D715(1)-07D715(3).
  49. K. Knížek, Z. Jirák, J. Hejtmánek, M. Maryško, J. Buršík
    Structure and properties of novel cobaltates Ln0.3CoO2 (Ln = La, Pr, and Nd)
    Journal of Applied Physics 111 (2012) 07D707(1)-07D707(3).
  50. K. Knížek, J. Hejtmánek, M. Maryško, Z. Jirák, J. Buršík
    Stabilization of the high-spin state of Co3+ in LaCo1-xRhxO3
    Physical Review B 85 (2012) 134401(1)-134401(7).