Research Update: Spin transfer torques in permalloy on monolayer MoS2

Wei Zhang, Joseph Sklenar, Bo Hsu, Wanjun Jiang, Matthias B. Jungfleisch, Jiao Xiao, Frank Y. Fradin, Yaohua Liu, John E. Pearson, John B. Ketterson, Zheng Yang, Axel Hoffmann

    Research output: Contribution to journalArticlepeer-review

    84 Scopus citations

    Abstract

    We observe current induced spin transfer torque resonance in permalloy (Py) grown on monolayer MoS2. By passing rf current through the Py/MoS2 bilayer, field-like and damping-like torques are induced which excite the ferromagnetic resonance of Py. The signals are detected via a homodyne voltage from anisotropic magnetoresistance of Py. In comparison to other bilayer systems with strong spin-orbit torques, the monolayer MoS2 cannot provide bulk spin Hall effects and thus indicates the purely interfacial nature of the spin transfer torques. Therefore our results indicate the potential of two-dimensional transition-metal dichalcogenide for the use of interfacial spin-orbitronics applications.

    Original languageEnglish
    Article number032302
    JournalAPL Materials
    Volume4
    Issue number3
    DOIs
    StatePublished - Mar 2016

    Funding

    Z.Y. acknowledges the financial support from the Department of Electrical and Computer Engineering and College of Engineering at University of Illinois at Chicago, IGNITE Award, and Discovery Award for the CVD growth of the MoS2 and optical characterizations. Work at Argonne, including device fabrication and magnetic and transport measurements, was supported by the U.S. Department of Energy, Office of Science, Materials Science and Engineering Division. Use of the Center for Nanoscale Materials for lithographic patterning was supported by the U.S. Department of Energy, Office of Science, and Basic Energy Sciences, under Contract No. DE-AC02-06CH11357. Work at ORNL is supported by the Division of Scientific User Facilities of the Office of Basic Energy Sciences, U.S. Department of Energy.

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