Fig. 4
From: Role of dimensional crossover on spin-orbit torque efficiency in magnetic insulator thin films
Role of TmIG MS on the ξDL. ξDL is proportional to the MS squared as shown in the text when the MS is small due to strong thermal fluctuation and surface modification effect. Insets show two cases: in the left inset, the magnetic moment density is small and thus the interfacial exchange interaction is weak, resulting in a small spin current injection; in the right inset, the magnetic moment density is large due to suppressed thermal fluctuation and thus the interfacial exchange interaction is strong, resulting in a large spin current injection. Definitions of the error bars for MS and ξDL are given in Figs. 1, 2, respectively
