RF signal detector and energy harvester based on a spin-torque diode with perpendicular magnetic anisotropy

We demonstrate theoretically that in a spintronic diode (SD), having a free magnetic layer with perpendicular magnetic anisotropy of the first and second order and no external bias magnetic field, the out-of-plane regime of magnetization precession can be excited by sufficiently large (exceeding a c...

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Bibliographic Details
Published in:AIP advances 2021-02, Vol.11 (2), p.025234-025234-5
Main Authors: Artemchuk, P. Yu, Prokopenko, O. V., Bankowski, E. N., Meitzler, T. J., Tyberkevych, V. S., Slavin, A. N.
Format: Article
Language:English
Subjects:
Bias
Broadband
Energy conversion efficiency
Energy harvesting
Magnetic anisotropy
Optimization
Radio frequency
Signal detectors
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Summary:We demonstrate theoretically that in a spintronic diode (SD), having a free magnetic layer with perpendicular magnetic anisotropy of the first and second order and no external bias magnetic field, the out-of-plane regime of magnetization precession can be excited by sufficiently large (exceeding a certain threshold) RF signals with the frequencies ≲250 MHz. We also show that such a device can operate as a broadband energy harvester capable of converting incident RF power into a DC power with a conversion efficiency of ∼5%. The developed analytical theory of the bias-free SD operation can be used for the optimization of high-efficiency RF detectors and energy harvesters based on SDs.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0042390