用Mn、Cu、Ru和Rh取代l10型FePt居里温度调谐的第一性原理计算

Q3 Engineering

Journal of the Magnetics Society of Japan Pub Date : 2020-01-01 DOI:10.3379/msjmag.2001l005

Y. Kota

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引用次数: 2

摘要

通过第一性原理计算，研究了l10型FePt有序合金中部分被Mn、Cu、Ru、Rh等过渡金属元素取代后的居里温度和温度变化。对于tc的理论评价，采用了基于相干势近似的无序局部矩法。计算结果表明，FePt中部分Pt被Ru取代后，tc降低最为显著，同时保持了较大的单轴磁各向异性常数，约为10.7 erg / cm3。电子结构分析表明，钌的取代降低了铁磁态的稳定性。

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First-Principles Calculation of Curie Temperature Tuning in L10-Type FePt by Element Substitution of Mn, Cu, Ru, and Rh

We studied the Curie temperature T C variation in L 1 0 -type FePt ordered alloys that were partially substituted with other transition metal elements, such as Mn, Cu, Ru, and Rh, by ﬁrst-principles calculations. For the theoretical evaluation of T C , a disordered local moment approach based on the coherent potential approximation was employed. The calculated results reveal that the most signiﬁcant reduction in T C was observed for FePt where some Pt was substituted by Ru, while a large uniaxial magnetic anisotropy constant on the order of 10 7 erg / cm 3 was maintained. An analysis of the electronic structure demonstrates that the stability of the ferromagnetic state is degraded by the substitution of Ru.

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来源期刊

Journal of the Magnetics Society of Japan Engineering-Electrical and Electronic Engineering

CiteScore

2.00

自引率

0.00%

发文量