{"title":"First-Principles Calculation of Curie Temperature Tuning in L10-Type FePt by Element Substitution of Mn, Cu, Ru, and Rh","authors":"Y. Kota","doi":"10.3379/msjmag.2001l005","DOIUrl":null,"url":null,"abstract":"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.","PeriodicalId":36791,"journal":{"name":"Journal of the Magnetics Society of Japan","volume":"9 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Magnetics Society of Japan","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3379/msjmag.2001l005","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Engineering","Score":null,"Total":0}
引用次数: 2
Abstract
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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