Electronic and heat transport phenomena in the nanogranular thiospinel Fe.sub.3./sub.S.sub.4./sub.

0543534 - FZÚ 2022 RIV US eng J - Článek v odborném periodiku
Knížek, Karel - Soroka, Miroslav - Kaman, Ondřej - Kuličková, Jarmila - Levinský, Petr - Hejtmánek, Jiří - Jirák, Zdeněk
Electronic and heat transport phenomena in the nanogranular thiospinel Fe₃S₄.
Physical Review B. Roč. 103, č. 24 (2021), č. článku 245129. ISSN 2469-9950. E-ISSN 2469-9969
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT(CZ) LM2018096; GA ČR GA18-12761S; GA ČR(CZ) GA19-06433S
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Výzkumná infrastruktura: e-INFRA CZ - 90140
Institucionální podpora: RVO:68378271
Klíčová slova: anomalous Hall effect * Nernst effect * Sebeck efect
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.908, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevB.103.245129

The iron sulphide Fe3S4(greigite) is similar to its oxide counterpart Fe3O4(magnetite) as to the crystal structure and ferrimagnetic order, but differs in electronic states. The ab initio calculations have evidenced p-type carriers at three spin-minority and three spin-majority Fermi surfaces, which is in contrast to the half-metallic character of magnetite with n-type carriers at three spin-minority Fermi surfaces. The transport properties including Hall and Nernst effects have been studied over the range 2–300 K by using nanogranular ceramics prepared by cold isostatic pressing of Fe3S4particles with the mean crystallite size of crystallite size of dXRD ≈ 80 and 30 nm,respectively. The samples show metalliclike electrical resistivity with large residual value at T → 0 K. The p-type character of the charge carriers is reflected by the positive sign of both the thermopower and Hall effect.
Trvalý link: http://hdl.handle.net/11104/0320731