Optical characterization of nonlocal spin transfer torque acting on a single nanomagnet

Article

关键词: MAGNETIZATION;    CURRENTS;    DRIVEN;   

DOI  :  10.1103/PhysRevB.89.094421

来源: SCIE

【 摘 要 】

Time-resolved scanning Kerr microscopy (TRSKM) has been used to examine the effect of nonlocal spin transfer torque (NL-STT) within a two-terminal current perpendicular-to-plane nonlocal spin valve. A combination of Oersted field and NL-STT was used to excite and control the magnetization dynamics. By comparison with a macrospin model, the strength of the NL-STT was quantified and found to be comparable to that achieved by direct injection of spin-polarized current. The sensitivity of the magneto-optical probe to small out-of-plane deflections of the magnetization also allows the NL-STT to be quantified in quasi-dc measurements, greatly simplifying the investigation of STT phenomena.

【 授权许可】

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