Crucial roles of phase competition and spin-lattice relaxation in the gigantic switchable optomagnet effect of Formula Presented

Y. H. Zhuang, H. W. Liu, Y. H. Li, Y. M. Chang, T. Kurumaji, Y. Tokura, Y. M. Sheu*

*此作品的通信作者

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摘要

It was discovered that crystal-field excitations involving spin-flip transitions play a crucial role in controlling switchable optomagnet effects in antiferromagnetic Formula Presented. However, when the flipped spins are in excited states to frustrate the balanced spin moments, the photoinduced magnetization has not occurred yet. Only after the ultrashort pulses disappear does the gigantic magnetization start to grow from a zero moment. In this study, we demonstrate that the gigantic optomagnetic effect is triggered by a two-step spin-flip process. Through the use of Kerr-effect microscopy and applications of the magnetic field, we discern between photoinduced switchable magnetization and nonswitchable demagnetization. Our experimental designs uncover all indispensable factors for the development of antiferromagnetic memory devices using insulating oxides.

原文English
文章編號024421
期刊Physical Review B
108
發行號2
DOIs
出版狀態Published - 1 7月 2023

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