[16p-Z19-1~23] 10.1 新物質・新機能創成（作製・評価技術）

▼ [16p-Z19-8] Tetragonal strain and perpendicular magnetic anisotropy in Mn_2−δCoGa_1+δ thin films

〇Mitsuhiro Matsuki^1,2、Takahide Kubota^2,3、Yohei Kota⁴、Keita Ito^2,3、Koki Takanashi^2,3,5 (1.Grad. School Eng., Tohoku Univ.、2.IMR, Tohoku Univ.、3.CSRN, Tohoku Univ.、4.NIT Fukushima College、5.CSIS, Tohoku Univ.)

キーワード：Heusler alloy

The layer thickness dependence of lattice strain, c/a and uniaxial magnetocrystalline anisotropy constant, K_u, of a Heusler alloy Mn₂CoGa films were investigated, in this study. Two kinds of substrates, MgO (100) and SrTiO₃ (100), were used to fabricate film samples showing different c/a ratios. A positive correlation between the values of c/a and K_u was confirmed. The sample series showing different c/a and K_u is interesting for characterizing spin dependent transport properties, such as anomalous Hall effect, anisotropic magnetoresistance effect, so on, in future study.