[15p-PA01-1~58] 10 Spintronics and Magnetics (Poster)

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

〇(M2)Hao Ding^1,2, Takeshi Seki², Keita Ito², Yasushi Endo¹, Koki Takanashi^2,3 (1.Grad. Sch. of Eng., Tohoku Univ., 2.IMR, Tohoku Univ., 3.JAEA)

Keywords: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.