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Reconfigurable and self-biased magnonic metamaterials

Haldar, Arabinda; Adeyeye, Adekunle Olusola

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Authors

Arabinda Haldar



Abstract

In magnonics, magnetic waves and oscillations are exploited for signal and information processing at microwave frequencies. A magnonic metamaterial is employed to configure different microwave bands by spatial engineering of magnetizations using different magnetic states or magnetic couplings. Magnetic field hysteretic variation of microwave responses has conventionally been used for tunable microwave operations. The use of such bias magnetic fields hinders the device integration of microwave magnonic devices. Here, we discuss a route to eliminating the requirement of bias magnetic field and simple initialization process for reconfigurable microwave operations. The distinct microwave responses are associated with different remanent magnetic states which are engineered by shape induced magnetic anisotropy rather than the conventional dipolar coupling driven magnetic states. However, the origin of the shift in the microwave spectra is associated with the variation of dipolar coupling for nanomagnetic networks, multilayer nanomagnets, and their arrays. This perspective provides an outlook on current challenges and potential future scopes of magnonic devices. We discuss some of our recent demonstrations toward the realizations of reconfigurable magnonic devices without any external bias magnetic field. Self-biased nanomagnets are also shown to have applications in designing a waveguide for spin wave transport and spin wave gating which operates without any bias magnetic field.

Citation

Haldar, A., & Adeyeye, A. O. (2020). Reconfigurable and self-biased magnonic metamaterials. Journal of Applied Physics, 128(24), Article 240902. https://doi.org/10.1063/5.0033254

Journal Article Type Article
Acceptance Date Dec 5, 2020
Online Publication Date Dec 23, 2020
Publication Date 2020
Deposit Date Dec 23, 2020
Publicly Available Date Mar 29, 2024
Journal Journal of Applied Physics
Print ISSN 0021-8979
Electronic ISSN 1089-7550
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 128
Issue 24
Article Number 240902
DOI https://doi.org/10.1063/5.0033254

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