Jiří Hejtmánek

activity

20122026

most citedThe ground state properties of the mixed-valence cobaltites Nd

_{0.7}

_{0.3}

CoO

_{3}

, Nd

_{0.7}

_{0.3}

CoO

_{3}

and Pr

_{0.7}

_{0.3}

CoO

_{3}

14 citations · 31 across the 7 of their papers we have counts for

collaborators

7 papers

cond-mat.mtrl-sci2026

Approaching the Limit of Intrinsic Crystalline Thermal Insulation

Ruihuan Cheng, Zhiqiang Cui, Mani Jayaraman +9

Crystalline materials with ultralow thermal conductivity ( $κ$ ) are potential thermal barrier coatings or thermoelectrics, yet the discovery of ultralow- $κ$ materials remains ineffi…

cond-mat.mtrl-sci2026

Thermal conductivity of CdCr $_{2}$ Se $_{4}$ ferromagnet at low temperatures: role of grain boundaries and porosity

Jiří Hejtmánek, Kyo-Hoon Ahn, Zdeněk Jirák +5

It is unambiguously demonstrated that the low temperature magnon specific heat in a ferromagnet varies as T $^{3/2}$ and the magnon thermal conductivity, due to T $^{1/2}$ - dependen…

cond-mat.mtrl-sci2025★ 8 cited

Accelerated Discovery of Crystalline Materials with Record Ultralow Lattice Thermal Conductivity via a Universal Descriptor

Xingchen Shen, Jiongzhi Zheng, Michael Marek Koza +9

Ultralow glass-like lattice thermal conductivity in crystalline materials is crucial for enhancing energy conversion efficiency in thermoelectrics and thermal insulators. We introd…

cond-mat.mtrl-sci2025

Two-component anomalous Hall and Nernst effects in anisotropic Fe $_{4 - x}$ Ge $_{x}$ N thin films

R. K. Paul, J. Vít, P. Levinský +18

A series of thin films Fe $_{4 - x}$ Ge $_{x}$ N (x=0-1) was fabricated onto MgO substrates by magnetron sputtering with the aim of studying the possible enhancement of the anomalous Nerns…

cond-mat.mtrl-sci2025★ 3 cited

Phonon properties and unconventional heat transfer in quasi-2D $B i_{2} O_{2} S e$ crystal

Jan Zich, Antonín Sojka, Petr Levinský +10

Bi2O2Se belongs to a group of quasi-2D semiconductors that can replace silicon in future high-speed/low-power electronics. However, the correlation between crystal/band structure a…

cond-mat.mtrl-sci2013★ 6 cited

Effect of Ising-type Tb $^{3 +}$ ions on the low-temperature magnetism of La, Ca cobaltite

K. Knížek, Z. Jirák, J. Hejtmánek +5

Crystal and magnetic structures of the $x = 0.2$ member of La $_{0.8 - x}$ Tb $_{x}$ Ca $_{0.2}$ CoO $_{3}$ perovskite series have been determined from the powder neutron diffraction. E…

cond-mat.mtrl-sci2012★ 14 cited

The ground state properties of the mixed-valence cobaltites Nd $_{0.7}$ Sr $_{0.3}$ CoO $_{3}$ , Nd $_{0.7}$ Ca $_{0.3}$ CoO $_{3}$ and Pr $_{0.7}$ Ca $_{0.3}$ CoO $_{3}$

Z. Jirak, J. Hejtmanek, K. Knizek +5

The electric, magnetic, and thermal properties of three perovskite cobaltites with the same 30% hole doping and ferromagnetic ground state were investigated down to very low temper…

Approaching the Limit of Intrinsic Crystalline Thermal Insulation

Thermal conductivity of CdCr2​Se4​ ferromagnet at low temperatures: role of grain boundaries and porosity

Accelerated Discovery of Crystalline Materials with Record Ultralow Lattice Thermal Conductivity via a Universal Descriptor

Two-component anomalous Hall and Nernst effects in anisotropic Fe4−x​Gex​N thin films

Phonon properties and unconventional heat transfer in quasi-2D Bi2​O2​Se crystal

Effect of Ising-type Tb3+ ions on the low-temperature magnetism of La, Ca cobaltite

The ground state properties of the mixed-valence cobaltites Nd0.7​Sr0.3​CoO3​, Nd0.7​Ca0.3​CoO3​ and Pr0.7​Ca0.3​CoO3​

Thermal conductivity of CdCr $_{2}$ Se $_{4}$ ferromagnet at low temperatures: role of grain boundaries and porosity

Two-component anomalous Hall and Nernst effects in anisotropic Fe $_{4 - x}$ Ge $_{x}$ N thin films

Phonon properties and unconventional heat transfer in quasi-2D $B i_{2} O_{2} S e$ crystal

Effect of Ising-type Tb $^{3 +}$ ions on the low-temperature magnetism of La, Ca cobaltite

The ground state properties of the mixed-valence cobaltites Nd $_{0.7}$ Sr $_{0.3}$ CoO $_{3}$ , Nd $_{0.7}$ Ca $_{0.3}$ CoO $_{3}$ and Pr $_{0.7}$ Ca $_{0.3}$ CoO $_{3}$