期刊
PHYSICAL REVIEW B
卷 96, 期 5, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.96.054406
关键词
-
资金
- US DOE-BES, Division of Materials Science and Engineering [DE-SC0012704]
The critical properties of the single-crystalline semiconducting ferromagnet Cr2Ge2Te6 were investigated by bulk dc magnetization around the paramagnetic to ferromagnetic phase transition. Critical exponents beta = 0.200 +/- 0.003 with a critical temperature T-c = 62.65 +/- 0.07 K and gamma=1.28 +/- 0.03 with T-c = 62.75 +/- 0.06 K are obtained by the Kouvel-Fisher method whereas delta = 7.96 +/- 0.01 is obtained by a critical isotherm analysis at T-c = 62.7 K. These critical exponents obey theWidom scaling relation delta = 1 +gamma/beta, indicating self-consistency of the obtained values. With these critical exponents the isotherm M( H) curves below and above the critical temperatures collapse into two independent universal branches, obeying the single scaling equation m = f +/-(h), where m and h are renormalized magnetization and field, respectively. The determined exponents match well with those calculated from the results of the renormalization group approach for a two-dimensional Ising system coupled with a long-range interaction between spins decaying as J (r) approximate to r(-(d+sigma)) with sigma = 1.52.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据