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Critical behavior of the single-crystalline van der Waals bonded ferromagnet Cr2Ge2Te6

文献类型：期刊论文

作者Liu, Wei1,2; Dai, Yuhui1,2; Yang, Yu-E3; Fan, Jiyu3; Pi, Li1,4; Zhang, Lei1; Zhang, Yuheng1,4
刊名PHYSICAL REVIEW B
出版日期2018-12-12
卷号98期号:21页码:6
ISSN号2469-9950
DOI10.1103/PhysRevB.98.214420
通讯作者Fan, Jiyu(jiyufan@nuaa.edu.cn) ; Zhang, Lei(zhanglei@hmfl.ac.cn)
英文摘要Layered Cr2Ge2Te6 is a promising two-dimensional (2D) material for van der Waals bonded ferromagnetic devices since its ferromagnetism can be maintained upon exfoliating the bulk down to a few layers. However, the magnetic interaction properties and phase-transition type of this system remain controversial. In this work, we systematically study the magnetic properties and critical behavior of Cr2Ge2Te6 single crystal. The angle dependence of magnetization indicates that Cr2Ge2Te6 has a weak magnetic anisotropy along the c axis but no magnetic anisotropy in the ab plane. Based on the field-dependent magnetic entropy change [Delta S-M(T, H)], the critical exponents of beta = 0.177(9), gamma = 1.746(8), and delta = 10.869(5) are obtained around T-c = 66.4(3) K. With these critical exponents, the M(T, H) and Delta S-M(T, H) curves follow the universality scaling laws, implying their high reliability and self consistency. The determined critical exponents are close to the 2D-Ising model with spatial dimensionality d = 2 and spin dimensionality n = 1. These results suggest that for 2D-Ising-like Cr2Ge2Te6, the weak magnetic anisotropy is crucial for the stabilization of the long-range ferromagnetic ordering, which is also consistent with the prediction of renormalized spin wave theory.
WOS关键词EQUATION-OF-STATE ; INTRINSIC FERROMAGNETISM ; CRITICAL EXPONENTS
资助项目National Key R&D Program of China[2017YFA0303201] ; National Natural Science Foundation of China[11574322] ; National Natural Science Foundation of China[11874358] ; National Natural Science Foundation of China[U1732276] ; National Natural Science Foundation of China[U1732273] ; National Natural Science Foundation of China[11574288]
WOS研究方向Materials Science ; Physics
语种英语
出版者AMER PHYSICAL SOC
WOS记录号WOS:000452990400004
资助机构National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.hfcas.ac.cn:8080/handle/334002/40815]  
专题合肥物质科学研究院_中科院强磁场科学中心
通讯作者Fan, Jiyu; Zhang, Lei
作者单位1.Chinese Acad Sci, Anhui Key Lab Condensed Matter Phys Extreme Condi, High Magnet Field Lab, Hefei 230031, Anhui, Peoples R China
2.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
3.Nanjing Univ Aeronaut & Astronaut, Dept Appl Phys, Nanjing 210016, Jiangsu, Peoples R China
4.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Wei,Dai, Yuhui,Yang, Yu-E,et al. Critical behavior of the single-crystalline van der Waals bonded ferromagnet Cr2Ge2Te6[J]. PHYSICAL REVIEW B,2018,98(21):6.
APA Liu, Wei.,Dai, Yuhui.,Yang, Yu-E.,Fan, Jiyu.,Pi, Li.,...&Zhang, Yuheng.(2018).Critical behavior of the single-crystalline van der Waals bonded ferromagnet Cr2Ge2Te6.PHYSICAL REVIEW B,98(21),6.
MLA Liu, Wei,et al."Critical behavior of the single-crystalline van der Waals bonded ferromagnet Cr2Ge2Te6".PHYSICAL REVIEW B 98.21(2018):6.

入库方式： OAI收割

来源：合肥物质科学研究院

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