[12a-S302-1~7] 10.3 Spin devices, magnetic memories and storages

▲ [12a-S302-6] Giant tunnel magnetoresistance and perpendicular magnetic anisotropy in (111)-oriented magnetic tunnel junctions with L1₁-ordered ferromagnetic alloys

〇Keisuke Masuda¹, Hiroyoshi Itoh², Yoshiaki Sonobe¹, Hiroaki Sukegawa¹, Seiji Mitani¹, Yoshio Miura¹ (1.NIMS, 2.Kansai Univ.)

Keywords:magnetic tunnel junctions, TMR, magnetic anisotropy

We theoreticaly studied the tunnel magnetoresistance (TMR) effect and magnetic anisotropy in unconventional (111)-oriented magnetic tunnel junctions (MTJs) with L1₁-ordered ferromagnetic alloys. We estimated the TMR ratios and magnetic anisotropy energies by using the first-principles calculations and found that the MTJs with Co-based L1₁ alloys have both high TMR ratios and large perpendicular magnetic anisotropies (PMA). In this talk, we will show the detailed calculation results and discuss the underlying mechanism for the obtained high TMR ratios and large PMA.