Low operational current spin Hall nano-oscillators based on NiFe/W bilayers | Zendy

Hamid Mazraati | Zendy; Sunjae Chung | Zendy; Afshin Houshang | Zendy; Mykola Dvornik | Zendy; Luca Piazza | Zendy; Fatjon Qejvanaj | Zendy; Sheng Jiang | Zendy; Tuan Quang Le | Zendy; Jonas Weissenrieder | Zendy; Johan Åkerman | Zendy

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Low operational current spin Hall nano-oscillators based on NiFe/W bilayers

Author(s) -

Hamid Mazraati,

Sunjae Chung,

Afshin Houshang,

Mykola Dvornik,

Luca Piazza,

Fatjon Qejvanaj,

Sheng Jiang,

Tuan Quang Le,

Jonas Weissenrieder,

Johan Åkerman

Publication year - 2016

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4971828

Subject(s) - microwave , spin hall effect , hall effect , spin (aerodynamics) , condensed matter physics , materials science , oscillation (cell signaling) , realization (probability) , nano , spin pumping , optoelectronics , spintronics , magnetoresistance , ferromagnetism , electrical resistivity and conductivity , physics , magnetic field , spin polarization , chemistry , electron , biochemistry , statistics , mathematics , quantum mechanics , composite material , thermodynamics

We demonstrate highly efficient spin Hall nano-oscillators (SHNOs) based on NiFe/beta-W bilayers. Thanks to the very high spin Hall angle of beta-W, we achieve more than a 60% reduction in the auto-oscillation threshold current compared to NiFe/Pt bilayers. The structural, electrical, and magnetic properties of the bilayers, as well as the microwave signal generation properties of the SHNOs, have been studied in detail. Our results provide a promising path for the realization of low-current SHNO microwave devices with highly efficient spin-orbit torque from beta-W. Published by AIP Publishing.

QC 20170215

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