[9p-PB1-1~80] 10 スピントロニクス・マグネティクス（ポスター講演）

▲ [9p-PB1-37] Superlattice-periods dependence on spin relaxation time in GaAs/GaAsP strained-compensated superlattice

〇Yuichi Nakamura¹、Xiuguang Jin²、Shunsuke Ohki¹、Daisuke Tanaka¹、Atsushi Tackeuchi¹ (1.Waseda Univ.、2.KEK)

キーワード：strain-compensated superlattice, spin relaxation, pump and probe

In this research, we investigated the superlattice-periods dependence on spin relaxation time in four GaAs/GaAsP strain-compensated superlattice (SL) samples, grown by MOCVD method, via time-resolved spin-dependent pump and probe reflection measurements. As a result, the spin relaxation time in 12 periods sample was 108 ps at 14 K, and positive SL-periods dependence of spin relaxation time was observed between 12 and 90 periods. We considered this result has an important meaning in elucidation of the spin relaxation mechanism in strain-compensated SLs.