Giant Magneto-Optical Effect in van der Waals Room-Temperature Ferromagnet Fe_(3)GaTe_(2)  

作　　者：张晓敏 王健 朱文凯 张佳茜 李伟浩 张菁 王开友 Xiaomin Zhang;Jian Wang;Wenkai Zhu;Jiaqian Zhang;Weihao Li;Jing Zhang;Kaiyou Wang(State Key Laboratory of Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;School of Materials,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China)

机构地区：[1]State Key Laboratory of Superlattices and Microstructures,Institute of Semiconductors,Chinese Academy of Sciences,Beijing 100083,China [2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China [3]School of Materials,Shenzhen Campus of Sun Yat-sen University,Shenzhen 518107,China

出　　处：《Chinese Physics Letters》2024年第6期148-155,共8页中国物理快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2022YFA1405100);the Beijing Natural Science Foundation Key Program(Grant No.Z220005);the National Natural Science Foundation of China(Grant Nos.12241405,12174384,and 12204058)。

摘　　要：The discovery of ferromagnetic two-dimensional(2D)van der Waals(vdWs)materials provides an opportunity to explore intriguing physics and to develop innovative spin electronic devices.However,the main challenge for practical applications of vd Ws ferromagnetic crystals lies in the weak intrinsic ferromagnetism and small perpendicular magnetic anisotropy(PMA)above room temperature.Here,we report the intrinsic vd Ws ferromagnetic crystal Fe_(3)GaTe_(2),synthesized by the self-flux method,exhibiting a Curie temperature(TC)of 370 K,a high saturation magnetization of 33.47 emu/g,and a large PMA energy density of approximately 4.17×10^(5)J/m^(3).Furthermore,the magneto-optical effect is systematically investigated in Fe_(3)GaTe_(2).The doubly degenerate E_(2g)(Γ)mode reverses the helicity of incident photons,indicating the existence of pseudoangular-momentum(PAM)and chirality.Meanwhile,the non-degenerate non-chiral A_(1g)(Γ)phonon exhibits a significant magneto-Raman effect under an external out-of-plane magnetic field.These results lay the groundwork for studying phonon chirality and magneto-optical phenomena in 2D magnetic materials,providing the feasibility for further fundamental research and applications in spintronic devices.

关 键 词：field FERROMAGNETIC DEGENERATE 

分 类 号：O469[理学—凝聚态物理]