[14p-PA1-1~74] 10 スピントロニクス・マグネティクス

▲ [14p-PA1-45] Remanent magnetic domain dependent spin-orbit torques in L1₀-FePt-C granular media

Ippei Suzuki¹、〇Shinji Isogami¹、Satoshi Sugimoto¹、Yukiko Takahashi^1,2 (1.NIMS、2.Waseda Univ.)

キーワード：FePt-C granular media, spin-orbit torque

L1₀-FePt-C granular media (5 nm) / Pt(2 nm) heterostructure was fabricated to evaluate the spin-orbit torques depending on the various domain structures via second harmonic Hall measurement. As a result, the longitudinal SOT effective field (H_L) was much larger than that of transverse SOT effective field (H_T) for all domain structures. The domain structure consisting of similar amount of up or down magnetization gave the maximum value, which was approximately half size for the beta-W/CoFeB heterostructures.