范德华材料Cr_(1.2)Te_(2)中磁临界行为研究  

MagneticCritical Behavior of the Van Der Waals Ferromagnet Cr_(1.2)Te_(2)

作　　者：张颖 张科 张春早 全桂英 Zhang Ying;Zhang Ke;Zhang Chunzao;Quan Guiying(School of Electronic Engineering,Huainan Normal University,Huainan 232038,China)

机构地区：[1]淮南师范学院电子工程学院,安徽淮南232038

出　　处：《黑河学院学报》2025年第3期180-183,共4页Journal of Heihe University

基　　金：中国博士后科学基金第75批面上资助项目“二维铁磁半导体CrTMX6中磁斯格明子物性调控研究”(2024M753262);淮南师范学院2024年校级质量工程项目“新时代高校教育、科技、人才一体化背景下大学物理课程思政的探索与实践”(2024hsjyxm12)。

摘　　要：范德华铁磁体CrTe_(2)因具有高于室温的居里温度和较大的磁矩,被认为是一种很有前途的二维材料。前期研究结果表明,Cr离子的浓度可显著调节CrTe_(2)的磁性各向异性,为进一步了解Cr原子自插层的CrTe_(2)的铁磁交换机理,系统地研究了Cr_(1.2)Te_(2)在居里转变温度附近铁磁向顺磁转变时的磁临界行为。通过多种分析方法,得到一组可靠的临界指数值(β=1.227(3),γ=1.244(6),δ=2.01(1))。同时临界行为表明Cr_(1.2)Te_(2)中磁交换相互作用J(r)随距离r的衰减符合J(r)≈r^(-4.80)的三维长程磁交换机制,该研究结果为未来设计基于Cr_(1.2)Te_(2)的自旋电子器件提供了基础。The van der Waals ferromagnet CrTe_(2)is a promising candidate due to its high Curie temperature at room temperature and large magnetic moment.Furthermore,the magnetic anisotropy can be adjusted by the concentration of Cr ion.To understand the ferromagnetic exchange mechanism involving the self-intercalation of Cr atoms into CrTe_(2),this study makes a systematical investigation on the critical behavior of Cr_(1.2)Te_(2),and obtains a set of reliable critical exponent values(β=1.227(3),γ=1.244(6),andδ=2.01(1))by using diverse analytical methods.The critical behavior suggests the exchange distance decaying approximately as J(r)≈r−4.80.The results of this study can provide a basis for the future design of Cr_(1.2)Te_(2)-based spintronic devices.

关 键 词：Cr_(1.2)Te_(2) 铁磁交换机制 磁化 临界指数 

分 类 号：TK225[动力工程及工程热物理—动力机械及工程]