[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-PA01-5] Remanent magnetic domain dependent spin-orbit torques in L1₀-FePt-C granular media

〇磯上 慎二¹、鈴木 一平¹、高橋 有紀子¹ (1.物材機構)

キーワード：FePtグラニュラー媒体、スピン軌道トルク

While the spin-orbit torques (SOTs) are investigated in the layered structures, the domain structure dependences and/or the amount of SOT in the granular films are not investigated to date. The present study is intended to fabricate the thinner L1₀-FePt-C granular/Pt heterostructures, then to evaluate the SOTs in the various domain structures via second harmonic measurements.The amount of field-like effective fieds (H_T) was much smaller than that of damping-like effective fields (H_L), and note that the H_L and H_T increased with decreasing remenent magnetization. The maximum value was approximately half size for the β-W/CoFeB heterostructures.