[15p-PA01-1~58] 10 スピントロニクス・マグネティクス（ポスター）

[15p-PA01-40] Structure and magnetic properties of epitaxial Fe-Ga thin films

〇(M2)丁 浩^1,2、関 剛斎²、伊藤 啓太²、遠藤 恭¹、高梨 弘毅^2,3 (1.東北大院工、2.東北大金研、3.原子力機構)

キーワード：Fe-Ga、Magnetostriction、Epitaxial growth

A previous study reported strong magnon-phonon coupling in the surface patterned Fe-Ga films. However, the previous study did not focus on the fundamental magnetic properties including magnetostrictions for the epitaxial Fe-Ga thin films. This study reports the effect of Ga concentration on structure and magnetic properties of epitaxial Fe-Ga films deposited on GaAs(001) and MgO(001) single crystal substrates. The epitaxial Fe-Ga films grown on GaAs(001) and MgO(001) show larger magnetostriction than the polycrystalline Fe-Ga films on the thermally-oxidized Si substrates. Saturation magnetostriction in the Fe-Ga [110] direction reaches a maximum of 145 ppm for Fe₇₀Ga₃₀ deposited on MgO(001), which is of the same order as that of bulk Fe-Ga.