Phonon-induced magnetization dynamics in Co-doped iron garnets

The developing field of strain-induced magnetization dynamics offers a promising path toward efficiently controlling spins and phase transitions. Understanding the underlying mechanisms is crucial in finding the optimal parameters supporting the phononic switching of magnetization. Here, we present...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Frej, A, Davies, C S, Kirilyuk, A, Stupakiewicz, A
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.07.2023
Subjects
Free electron lasers
Garnets
Iron
Magnetic switching
Magnetization
Phase transitions
Phonons
Physics - Materials Science
Precession
Online AccessGet full text

Cover

More Information
Summary:The developing field of strain-induced magnetization dynamics offers a promising path toward efficiently controlling spins and phase transitions. Understanding the underlying mechanisms is crucial in finding the optimal parameters supporting the phononic switching of magnetization. Here, we present an experimental and numerical study of time-resolved magnetization dynamics driven by the resonant excitation of an optical phonon mode in iron garnets. Upon pumping the latter with an infrared pulse obtained from a free-electron laser, we observe spatially-varying magnetization precession, with its phase depending on the direction of an external magnetic field. Our micromagnetic simulations effectively describe the magnetization precession and switching in terms of laser-induced changes in the crystal's magneto-elastic energy.
ISSN:2331-8422
DOI:10.48550/arxiv.2307.01907