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High-frequency magnetic response of crystalline and nanocrystalline antiferromagnetic NiO

Authors :
Kacper Brzuszek
Caroline A. Ross
Andrzej Janutka
Source :
AIP Advances, Vol 14, Iss 2, Pp 025222-025222-5 (2024)
Publication Year :
2024
Publisher :
AIP Publishing LLC, 2024.

Abstract

Performing micromagnetic simulations, we study the efficiency of response of bulk and polycrystalline nickel oxide (NiO) to high-frequency (up to 100 GHz) magnetic fields with relevance to potential application of the antiferromagnet as a core material to high-frequency coils and resonators. NiO is advantageous due to its insulating property and high Néel temperature. Though the dynamical susceptibility of the antiferromagnet is low, the achievable product of susceptibility and frequency (“performance factor”) appears to be relatively high, comparable to that of previously considered superferromagnetic systems. This makes NiO a potential core material for operating at extremely-high (sub-THz) frequency. The influence of thermal fluctuations on the susceptibility is estimated to be weak up to room temperature even for a nanocrystalline antiferromagnet, whereas, the magnetic response is linear for much wider ranges of frequencies and field amplitudes than for ferromagnetic and superferromagnetic systems.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
14
Issue :
2
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.3a550340b40bba71d20e2bb614f17
Document Type :
article
Full Text :
https://doi.org/10.1063/9.0000781