论文标题
Van der waals Fe5gete2晶体的磁临界行为具有近乎室温的铁磁性
Magnetic critical behavior of the van der Waals Fe5GeTe2 crystal with near room temperature ferromagnetism
论文作者
论文摘要
范德华（Van der Waals）Ferromagnet Fe5gete2的居里温度TC约为270 K，可以通过调整FE缺乏含量来使其高于室温。为了洞悉其铁磁交换，我们通过测量围绕铁磁性到顺磁相变的大块Fe5gete2晶体的磁化来研究了临界行为。通过采用各种技术（包括修改的Arott图，Kouvel-Fisher图和关键等温线分析）实现了一组可靠的关键指数，其TC = 273.7 k，beta = 0.3457，伽马= 1.40617和Delta = 5.021，与三二维磁性交换（4. 4. 4. 4. 4.）它接近具有远距离磁耦合的三维海森堡模型。
The van der Waals ferromagnet Fe5GeTe2 has a Curie temperature TC of about 270 K, which can be raised above room temperature by tuning the Fe deficiency content. To achieve insights into its ferromagnetic exchange, we have studied the critical behavior by measuring the magnetization in bulk Fe5GeTe2 crystal around the ferromagnetic to paramagnetic phase transition. The analysis of the magnetization by employing various techniques including the modified Arrott plot, Kouvel-Fisher plot and critical isotherm analysis achieved a set of reliable critical exponents with TC = 273.7 K, beta = 0.3457, gamma = 1.40617, and delta = 5.021, suggesting a three-dimensional magnetic exchange with the distance decaying as J(r) ~ (r)$^-4.916, which is close to that of a three-dimensional Heisenberg model with long-range magnetic coupling.
