Microstructure and magnetic properties of anisotropic polycrystalline Sm(Fe0.8Co0.2)12 thin films with ThMn12 structure

D. Ogawa, Y. Takahashi, S. Hirosawa, K. Hono

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The ThMn12-type hard magnetic compounds composed of rare earth elements and 3d ferromagnetic transition metals such as Fe have been known as possible candidates for the development of permanent magnet materials. In order to stabilize the ThMn12 phase, the substitution of Fe with non-magnetic element M such as Ti, V, Mo and Si is required [1,2], which results in the reduction of saturation magnetization μ0Ms. Kuno et al. reported that high μ0Ms of 1.63 T in strip cast alloy by doping Zr in Sm site. and controlling the content of non-magnetic element M with the (Sm0.8Zr0.2) (Fe0.75Co0.25)Ti0.5 composition [3]. Recently, Hirayama et al. showed excellent intrinsic hard magnetic properties with saturation magnetization μ0Ms of 1.78 T, anisotropy field μ0HA of 12 T and Curie temperature Tc of 859 K for epitaxial Sm(Fe0.8Co0.2)12 films prepared by sputtering process, which are superior to those of Nd2Fe14B [4], Owing to these promising intrinsic properties, the Sm(Fe0.8Co0.2)12 compound can be a candidate for high performance permanent magnet applications. One drawback of ThMn12 compound based magnets is their too low coericvity [5, 6]; however, considering the value of the anisotropy field, there is still room for improving coercivity. The purpose of the present investigation is to explore the possibilities for obtaining high coercivity in Sm(Fe0.8Co0.2)12 based alloy using strongly textured polycys-talline thin films.

Original languageEnglish
Title of host publication2018 IEEE International Magnetic Conference, INTERMAG 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538664254
DOIs
Publication statusPublished - 2018 Oct 24
Externally publishedYes
Event2018 IEEE International Magnetic Conference, INTERMAG 2018 - Singapore, Singapore
Duration: 2018 Apr 232018 Apr 27

Publication series

Name2018 IEEE International Magnetic Conference, INTERMAG 2018

Other

Other2018 IEEE International Magnetic Conference, INTERMAG 2018
Country/TerritorySingapore
CitySingapore
Period18/4/2318/4/27

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation

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