Simultaneous Optical and Electrical Spin-Torque Magnetometry with Phase-sensitive Detection of Spin Precession

Li, Yi; Saglam, Hilal; Zhang, Zhizhi; Bidthanapally, Rao; Xiong, Yuzan; Pearson, John E.; Novosad, Valentine; Qu, Hongwei; Srinivasan, Gopalan; Hoffmann, Axel; Zhang, Wei

doi:10.1103/PhysRevApplied.11.034047

Simultaneous Optical and Electrical Spin-Torque Magnetometry with Phase-sensitive Detection of Spin Precession

Journal Article · Tue Mar 19 00:00:00 EDT 2019 · Physical Review Applied

DOI:https://doi.org/10.1103/PhysRevApplied.11.034047· OSTI ID:1505167

Li, Yi ^[1]; Saglam, Hilal ^[2]; Zhang, Zhizhi ^[3]; Bidthanapally, Rao ^[4]; Xiong, Yuzan ^[5]; Pearson, John E. ^[6]; Novosad, Valentine ^[6]; Qu, Hongwei ^[5]; Srinivasan, Gopalan ^[4]; Hoffmann, Axel ^[6]; Zhang, Wei ^[1]

Oakland Univ., Rochester, MI (United States). Dept. of Physics; Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Illinois Inst. of Technology, Chicago IL (United States). Dept. of Physics
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division; Huazhong Univ. of Science and Technology, Wuhan (China). School of Optical and Electronic Information
Oakland Univ., Rochester, MI (United States). Dept. of Physics
Oakland Univ., Rochester, MI (United States). Dept. of Electrical and Computer Engineering
Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division

Spin-based coherent information processing and encoding utilize the precession phase of spins in magnetic materials. However, the detection and manipulation of spin precession phases remain a major challenge for advanced spintronic functionalities. By using simultaneous electrical and optical detection, we demonstrate the direct measurement of the spin precession phase of a permalloy device driven by the spin-orbit torques from adjacent heavy metals. The spin Hall angle of the heavy metals can be independently determined from concurrent electrical and optical signals. The phase-sensitive optical detection also allows spatially-resolved measurements of local spin-torque parameters and ferromagnetic resonance with comprehensive amplitude and phase information. Here, our study offers a route toward future advanced characterizations of spin-torque oscillators, magnonic circuits, and tunneling junctions, where measuring the current-induced spin dynamics of individual nanomagnets is required.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF)

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1505167

Journal Information:: Physical Review Applied, Journal Name: Physical Review Applied Journal Issue: 3 Vol. 11; ISSN 2331-7043

Country of Publication:: United States

Language:: English

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