Voltage-controlled nanoscale reconfigurable magnonic crystal

Qi Wang, Andrii V. Chumak, Lichuan Jin, Huaiwu Zhang, Burkard Hillebrands, and Zhiyong Zhong
Phys. Rev. B 95, 134433 – Published 19 April 2017
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Abstract

A nanoscale reconfigurable magnonic crystal is designed using voltage-controlled perpendicular magnetic anisotropy (PMA) in ferromagnetic-dielectric heterostructures. A periodic array of gate metallic strips is placed on top of a MgO/Co structure in order to apply a periodic electric field and to modify the PMA in Co. It is numerically demonstrated that the introduction of PMA, which can be realized experimentally via applying a voltage, modifies the spin-wave propagation and leads to the formation of band gaps in the spin-wave spectrum. The band gaps can be controlled, i.e., it is possible to switch band gaps on and off within a few tens of nanoseconds. The width and the center frequency of the band gaps are defined by the applied voltage. Finally, it is shown that the introduction of PMA to selected, rather than to all gate strips allows for a predefined modification of the band-gap spectra. The proposed voltage-controlled reconfigurable magnonic crystal opens a way to low power consumption magnonic applications.

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  • Received 29 July 2016
  • Revised 17 March 2017

DOI:https://doi.org/10.1103/PhysRevB.95.134433

©2017 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Qi Wang1,2,3,*, Andrii V. Chumak2, Lichuan Jin1, Huaiwu Zhang1, Burkard Hillebrands2, and Zhiyong Zhong1,†

  • 1State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
  • 2Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany
  • 3National Engineering Research Center of Electromagnetic Radiation Control Materials, University of Electronic Science and Technology of China, Chengdu 610054, China

  • *qiwang@rhrk.uni-kl.de
  • zzy@uestc.edu.cn

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Issue

Vol. 95, Iss. 13 — 1 April 2017

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