Statistical and analytical approaches to finite-temperature magnetic properties of the compound SmFe.sub.12./sub.

0535331 - FZÚ 2021 RIV US eng J - Journal Article
Yoshioka, T. - Tsuchiura, H. - Novák, Pavel
Statistical and analytical approaches to finite-temperature magnetic properties of the compound SmFe₁₂.
Physical Review B. Roč. 102, č. 18 (2020), s. 1-14, č. článku 184410. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : SmFe₁₂ * effective spin model * analytical method * magnetic anisotropy
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.036, year: 2020
Method of publishing: Limited access
https://doi.org/10.1103/PhysRevB.102.184410

To investigate the magnetic properties of SmFe12, we construct an effective spin model, where magnetic moments, crystal-field (CF) parameters, and exchange fields at 0 K are determined by first-principles calculations.Finite-temperature magnetic properties are investigated by using this model. We further develop an analytical method with strong mixing of states with a different quantum number of angular momentum J (J-mixing), which is caused by a strong exchange field acting on the spin component of 4 f electrons. Comparing our analytical results with those calculated by Boltzmann statistics, we clarify that the previous analytical studies for Sm transition-metal compounds overestimate the J-mixing effects.

Permanent Link: http://hdl.handle.net/11104/0313385