Magnetization under High Pressure in MnSi
Magnetization under High Pressure in MnSi
复制标题
MnSi 高压下的磁化
DOI：
10.1143/jpsj.67.3605
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
G. Lapertot
中科院分区：
文献类型：
--
作者：
C. Thessieu;K. Kamishima;T. Gotō;G. Lapertot
在高达 10.2 kbar 的高压和高达 9 特斯拉的高磁场下测量了弱螺旋磁性流动化合物 MnSi 的磁化强度 M(H)。我们在自洽重整化理论（SCR）的自旋涨落框架中解释了饱和磁化强度 p s 和居里温度 T c 在压力下的同时下降。通过对所谓的 Arrott 图（ H / p [ H , T ] 与 p 2 [ H , T ] ）的分析以及 p s 和 T c 各自的体积依赖性，我们估计了当系统接近其临界压力 P c = 15 kbar 时特征自旋波动温度 T 0 和 T A 的演变，对应于 T = 0 时长程磁序的消失。
The magnetization M(H) has been measured in the weakly helimagnetic itinerant compound MnSi under high pressure up to 10.2 kbar and high magnetic field up to 9 Tesla. We interpret the simultaneous decrease under pressure of the saturated magnetization, p s , and the Curie temperature, T c in the frame of the self-consistent renormalization theory (SCR) of spin fluctuations. From the analysis of the so-called Arrott-plot ( H / p [ H , T ] versus p 2 [ H , T ] ) and the respective volume dependence of p s and T c , we estimate the evolution of the characteristic spin fluctuation temperatures, T 0 and T A when the system approaches its critical pressure, P c =15 kbar, corresponding to the disappearance of the long range magnetic order at T =0.