Magnetic Properties of Layered Itinerant Electron Ferromagnet Fe3GeTe2
Magnetic Properties of Layered Itinerant Electron Ferromagnet Fe3GeTe2
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DOI：
10.7566/jpsj.82.124711
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发表时间：
2013-12-01
影响因子：
1.7
通讯作者：
Fang, MingHu
中科院分区：
文献类型：
--
作者：
Chen, Bin;Yang, JinHu;Fang, MingHu
我们成功地合成了层状结构铁磁体Fe3GeTe2的单晶样品，并用粉末X射线衍射(XRD)、磁化率X(T)、等温磁化强度M(H)、比热C(T)和电阻率Rho(T)等方法对其进行了完整的表征。粉末X射线衍射数据的Rietveld修正证实了Fe3GeTe2属于p6(3)/MMC空间群。X_i(T)，C(T)和Rho(T)数据表明，在T-C=220K时，体铁磁性有序，在零温下的饱和磁矩为1.625µ(B)/Fe。外加磁场H沿c轴和ab平面的磁测量表明，该材料具有很大的各向异性。我们发现在该材料中符合修正的Arrott图(M-4-H/M)而不是M-2-H/M图。广义的Rhodes-Wohlfarth比表明这种材料具有巡回磁性。在自旋涨落的自洽重整化(SCR)和高桥理论的框架下，估算了自旋涨落参数，并讨论了其磁性质。
We have successfully synthesized a single-crystal sample of the layered structure ferromagnet Fe3GeTe2 and present the results of its complete characterization using powder X-ray diffraction (XRD), magnetic susceptibility chi(T), isotherm magnetization M(H), specific heat C(T), and electrical resistivity rho(T) measurements. The rietveld refinement of the powder XRD data confirms that Fe3GeTe2 crystallizes in the space group p6(3)/mmc. The chi(T), C(T), and rho(T) data indicate bulk ferromagnetic ordering at T-C = 220 K with a saturation moment of 1.625 mu(B)/Fe at zero temperature. The magnetic measurements of the external magnetic field H applied along the c-axis and ab-plane show a large anisotropy in this material. We found that the modified Arrott plot (M-4-H/M) rather than the M-2-H/M plot is obeyed in this material. The generalized Rhodes-Wohlfarth ratio indicates an itinerant magnetism in this material. The spin fluctuation parameters are estimated and the magnetic properties are discussed in the framework of the self-consistent renormalization (SCR) and Takahashi theory of spin fluctuations.