Temperature dependence of magnetocrystalline anisotropy constants in the single variant state of L 10-type FePt bulk single crystal

K. Inoue, H. Shima, Asaya Fujita, K. Ishida, K. Oikawa, K. Fukamichi

研究成果: Article査読

49 被引用数 (Scopus)

抄録

The temperature dependence of magnetocrystalline anisotropy constants and the saturation magnetization in a single variant state have been investigated for L 10 -type Fe60 Pt40 bulk single crystal prepared under compressive stress. The uniaxial magnetocrystalline anisotropy constant Ku evaluated from the magnetization curve is 6.9× 107 erg cm-3 at 5 K. The values of the second- and fourth-order magnetocrystalline anisotropy constants K1 and K2 at 5 K determined by the Sucksmith-Thompson method are 7.4 and 0.13× 107 erg cm-3, respectively. Both the values of Ku and K1 decrease with increasing temperature T, while K2 is almost independent of T. The difference between the power law of the Callen and Callen model is described by the dimensionality and the thermal variation of the axial ratio ca due to the thermal expansion.

本文言語English
論文番号102503
ジャーナルApplied Physics Letters
88
10
DOI
出版ステータスPublished - 2006 3 20

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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