Reconfigurable and self-biased magnonic metamaterials

Haldar, Arabinda and Adeyeye, Adekunle Olusola (2020) Reconfigurable and self-biased magnonic metamaterials. Journal of Applied Physics, 128 (24). p. 240902. ISSN 0021-8979

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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. © 2020 Author(s).

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IITH Creators:

IITH Creators	ORCiD
Haldar, Arabinda	https://orcid.org/0000-0002-0490-9719

Item Type:

Article

Additional Information:

A.H. would like to acknowledge funding under the Early Career Research Award (No. ECR/2017/000571) and Ramanujan Fellowship (No. SB/S2/RJN-118/2016), Department of Science and Technology (DST). A.O.A. would like to acknowledge funding from the Royal Society and Wolfson Foundation.

Uncontrolled Keywords:

Magnetic fields; Metamaterials; Microwave oscillators; Microwave spectroscopy; Microwaves; Multilayers; Nanomagnetics; Spin waves

Subjects:

Physics

Divisions:

Department of Physics

Depositing User:

. LibTrainee 2021

Date Deposited:

23 Nov 2022 09:08

Last Modified:

23 Nov 2022 09:08