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    Giant magneto-spin-Seebeck effect and magnon transfer torques in insulating spin valves

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    Author
    Cheng, Yihong cc
    Chen, Kai
    Zhang, Shufeng
    Affiliation
    Univ Arizona, Dept Phys
    Issue Date
    2018-01-29
    
    Metadata
    Show full item record
    Publisher
    AMER INST PHYSICS
    Citation
    Giant magneto-spin-Seebeck effect and magnon transfer torques in insulating spin valves 2018, 112 (5):052405 Applied Physics Letters
    Journal
    Applied Physics Letters
    Rights
    Rights managed by AIP Publishing.
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    We theoretically study magnon transport in an insulating spin valve (ISV) made of an antiferromagnetic insulator sandwiched between two ferromagnetic insulator (FI) layers. In the conventional metal-based spin valve, the electron spins propagate between two metallic ferromagnetic layers, giving rise to giant magnetoresistance and spin transfer torque. Here, the incoherent magnons in the ISV serve as angular momentum carriers and are responsible for the angular momentum transport between two FI layers across the antiferromagnetic spacer. We predict two transport phenomena in the presence of the temperature gradient: a giant magneto-spin-Seebeck effect in which the output voltage signal is controlled by the relative orientation of the two FI layers and magnon transfer torque that can be used for switching the magnetization of the FI layers with a temperature gradient of the order of 0.1 Kelvin per nanometer. Published by AIP Publishing.
    Note
    12 month embargo; published online: 31 January 2018
    ISSN
    0003-6951
    1077-3118
    DOI
    10.1063/1.5018411
    Version
    Final published version
    Sponsors
    U.S. National Science Foundation [ECCS-1708180]
    Additional Links
    http://aip.scitation.org/doi/10.1063/1.5018411
    ae974a485f413a2113503eed53cd6c53
    10.1063/1.5018411
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    UA Faculty Publications

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