Nutation in Antiferromagnetic Resonance

Mondal, Ritwik and Großenbach, Sebastian and Rózsa, Levente and Nowak, Ulrich (2021) Nutation in Antiferromagnetic Resonance. PHYSICAL REVIEW B : COVERING CONDENSED MATTER AND MATERIALS PHYSICS, 103 (10). pp. 1-11. ISSN 2469-9950 (print); 2469-9969 (online)

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Abstract

The effect of inertial spin dynamics is compared between ferromagnetic, antiferromagnetic, and ferromagnetic systems. The linear response to an oscillating external magnetic field is calculated within the framework of the inertial Landau-Lifshitz-Gilbert equation using analytical theory and computer simulations. Precession and nutation resonance peaks are identified, and it is demonstrated that the precession frequencies are reduced by the spin inertial, while the lifetime of the excitations is enhanced. The interplay between precession and nutation is found to be the most prominent in antiferromagnets, where the timescale of the exchange-driven sublattice dynamics is comparable to inertial relaxation times. Consequently, antiferromagnetic resonance techniques should be better suited for the search for intrinsic inertial spin dynamics on ultrafast timescales than ferromagnetic resonance.

Item Type:	Article
Subjects:	Q Science / természettudomány > QC Physics / fizika > QC06 Physics of condensed matter / szilárdtestfizika
Depositing User:	Dr. Levente Rózsa
Date Deposited:	24 Nov 2021 13:58
Last Modified:	24 Nov 2021 14:00
URI:	http://real.mtak.hu/id/eprint/133747

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