Artificial metamaterials for reprogrammable magnetic and microwave properties

We demonstrate a reliable method for realizing various antiferromagnetic states in lithographically defined, dipolar coupled rhomboid nanomagnets. We directly probe the remanent state using magnetic force microscopy and measured the microwave absorptions using broadband ferromagnetic resonance spect...

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Published in:Applied physics letters 2016-01, Vol.108 (2)
Main Authors: Haldar, Arabinda, Adeyeye, Adekunle Olusola
Format: Article
Language:English
Subjects:
Antiferromagnetism
Applied physics
Broadband
Ferromagnetic resonance
Ferromagnetism
Magnetic fields
Magnetic properties
Metamaterials
Microwave absorption
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Adeyeye, Adekunle Olusola
description We demonstrate a reliable method for realizing various antiferromagnetic states in lithographically defined, dipolar coupled rhomboid nanomagnets. We directly probe the remanent state using magnetic force microscopy and measured the microwave absorptions using broadband ferromagnetic resonance spectroscopy technique. Reprogrammable microwave absorption properties are shown by switching between ferromagnetic and antiferromagnetic remanent states using a simple field initialization. There is a direct correlation between the magnetic remanent states and the microwave responses. Experimental results were supported by micromagnetic simulations which show a good agreement. The results may find applications in low power magnonic devices based on reprogrammable magnetic metamaterials.
doi_str_mv 10.1063/1.4939852
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source American Institute of Physics:Jisc Collections:Transitional Journals Agreement 2021-23 (Reading list); AIP Journals (American Institute of Physics)
subjects Antiferromagnetism
Applied physics
Broadband
Ferromagnetic resonance
Ferromagnetism
Magnetic fields
Magnetic properties
Metamaterials
Microwave absorption
title Artificial metamaterials for reprogrammable magnetic and microwave properties
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