First-principles study of exchange interactions of yttrium iron garnet

Li Shan Xie, Guang Xi Jin, Lixin He, Gerrit E.W. Bauer, Joseph Barker, Ke Xia

研究成果: Article査読

58 被引用数 (Scopus)

抄録

Yttrium iron garnet is the ubiquitous magnetic insulator used for studying pure spin currents. The exchange constants reported in the literature vary considerably between different experiments and fitting procedures. Here we calculate them from first principles. The local Coulomb correction (U-J) of density-functional theory is chosen such that the parametrized spin model reproduces the experimental Curie temperature and a large electronic band gap, ensuring an insulating phase. The magnon spectrum calculated with our parameters agrees reasonably well with that measured by neutron scattering. A residual disagreement about the frequencies of optical modes indicates the limits of the present methodology.

本文言語English
論文番号014423
ジャーナルPhysical Review B
95
1
DOI
出版ステータスPublished - 2017 1月 19

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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