Systematic experimental search for Fe.sub.2./sub.YZ Heusler compounds predicted by ab-initio calculation

0551213 - FZÚ 2022 RIV GB eng J - Článek v odborném periodiku
Kratochvílová, M. - Klicpera, M. - Malý, F. - Valenta, J. - Veis, M. - Colman, R.H. - Heczko, Oleg
Systematic experimental search for Fe₂YZ Heusler compounds predicted by ab-initio calculation.
Intermetallics. Roč. 131, Apr. (2021), č. článku 107073. ISSN 0966-9795. E-ISSN 1879-0216
Grant CEP: GA ČR GA19-09882S; GA MŠMT(CZ) LM2018096
Institucionální podpora: RVO:68378271
Klíčová slova: Heusler alloy * Fe₂NiGe * Fe₂NiSi * Fe₃Ga * L2₁ ordering * ferromagnetic compound
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 4.075, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.intermet.2020.107073

An extensive experimental investigation of Fe-based Heusler alloys has been performed in order to potentially prepare new materials which are tetragonally distorted and have large perpendicular magnetic anisotropy crucial not only for the STT-MRAM applications but also for magnetic shape memory devices. Based on criteria demanded for the MSM applications 25 Fe2YZ various compounds were selected for the synthesis using arc melting from more than 60 systems suggested theoretically. Only four compounds Fe2MnSn, Fe2NiSi, Fe2NiGe, and Fe3Ga were homogeneous single phase. None of the studied Fe-based materials exhibited the predicted tetragonal structure. Magnetic measurements confirmed that all investigated compounds are soft ferromagnets with no sign of a structural transition. Our results contradict the ab-initio calculations showing the limits of theoretical predictions by incomplete high throughput calculations as well as the limitations of the standard synthesis techniques.
Trvalý link: http://hdl.handle.net/11104/0326674