Critical behavior of quasi-two-dimensional ferromagnet Cr_(1.04)Te_(2)  

作　　者：钮伟 宋沁心 常世琦 王敏 袁奎 高嘉程 王硕 王振东 刘凯斐 刘萍 徐永兵 张晓倩 普勇 Wei Niu;Qin-Xin Song;Shi-Qi Chang;Min Wang;Kui Yuan;Jia-Cheng Gao;Shuo Wang;Zhen-Dong Wang;Kai-Fei Liu;Ping Liu;Yong-Bing Xu;Xiao-Qian Zhang;Yong Pu(Jiangsu Provincial Engineering Research Center of Low Dimensional Physics and New Energy&School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China;School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China;Key Laboratory of Quantum Materials and Devices of Ministry of Education,School of Physics,Southeast University,Nanjing 211189,China)

机构地区：[1]Jiangsu Provincial Engineering Research Center of Low Dimensional Physics and New Energy&School of Science,Nanjing University of Posts and Telecommunications,Nanjing 210023,China [2]School of Electronic Science and Engineering,Nanjing University,Nanjing 210023,China [3]Key Laboratory of Quantum Materials and Devices of Ministry of Education,School of Physics,Southeast University,Nanjing 211189,China

出　　处：《Chinese Physics B》2024年第7期87-94,共8页中国物理B（英文版）

基　　金：Project supported by the Natural Science Foundation of Nanjing University of Posts and Telecommunications(Grant No.NY222170);Jiangsu Specially-Appointed Professor Program,and Natural Science Foundation of Universities of Jiangsu Province(Grant No.TJ219008);the support of the open research fund of Key Laboratory of Quantum Materials and Devices(Southeast University),Ministry of Education。

摘　　要：The self-intercalation of Cr into pristine two-dimensional(2D) van der Waals ferromagnetic CrTe_(2),which forms chromium tellurides(Cr_(x)Te_(2)),has garnered interest due to their remarkable magnetic characteristics and the wide variety of chemical compositions available.Here,comprehensive basic characterization and magnetic studies are conducted on quasi-2D ferromagnetic Cr_(1.04)Te_(2) crystals.Measurements of the isothermal magnetization curves are conducted around the critical temperature to systematically investigate the critical behavior.Specifically,the critical exponents β=0.2399,γ=0.859,and δ=4.3498,as well as the Curie temperature T_(C)=249.56 K,are determined using various methods,including the modified Arrott plots,the Kouvel-Fisher method,the Widom scaling method,and the critical isotherm analysis.These results indicate that the tricritical mean-field model accurately represents the critical behavior of Cr_(1.04)Te_(2.A magnetic phase diagram with tricritical phenomenon is thus constructed.Further investigations confirm that the critical exponents obtained conform to the scalar equation near T_(C),indicating their self-consistency and reliability.Our work sheds light on the magnetic properties of quasi-2D Cr_(1.04)Te_(2),broadening the scope of the van der Waals crystals for developments of future spintronic devices operable at room temperature.

关 键 词：critical behavior van der Waals magnets self-intercalation magnetic measurement 

分 类 号：O469[理学—凝聚态物理]