Publication Date:
2018-09-29
Description:
Author(s): Congli He, Guoqiang Yu, Cecile Grezes, Jiafeng Feng, Zhen Zhao, Seyed Armin Razavi, Qiming Shao, Aryan Navabi, Xiang Li, Qing Lin He, Mengyin Li, Jia Zhang, Kin L. Wong, Dan Wei, Guangyu Zhang, Xiufeng Han, Pedram Khalili Amiri, and Kang L. Wang Studying resonance modes in exchange-coupled ferromagnetic bilayers is typically accomplished by a ferromagnetic resonance (FMR) technique, in which case it is usually difficult to excite the optical mode, because the out-of-phase resonance cannot efficiently couple to a uniform excitatory magnetic field. This work shows that spin-torque FMR (ST-FMR) can be used to efficiently excite the optical resonance mode, because the current-induced torque does not act uniformly on the two ferromagnetic layers. The results indicate that ST-FMR is an effective probe of interlayer exchange coupling in such systems, to the benefit of research on spintronic devices. [Phys. Rev. Applied 10, 034067] Published Fri Sep 28, 2018
Electronic ISSN:
2331-7019
Topics:
Physics
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