Critical phenomena and the quantum critical point of ferromagnetic Zr1-xNbxZn2
Critical phenomena and the quantum critical point of ferromagnetic Zr1-xNbxZn2
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DOI：
10.1103/physrevlett.96.116404
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发表时间：
2006-03-24
影响因子：
8.6
通讯作者：
Fisk, Z
中科院分区：
文献类型：
--
作者：
Sokolov, DA;Aronson, MC;Fisk, Z
我们用Arrot图分析了Zr1-xNbxZn2的磁化强度，研究了它的磁性质。当Nb浓度x(C)=0.083+/-0.002时，居里温度T-C被抑制到零温度，而自发力矩则如斯通纳理论所预言的那样随T-C线性地消失。初始磁化率chi对x x(C)表现出临界行为。由此得到的磁相图表明，当x=x(C)时，量子临界行为扩展到最宽的温度范围，并演示了有限转变温度铁磁是如何通过量子临界点转变为顺磁网的。
We present a study of the magnetic properties of Zr1-xNbxZn2, using an Arrott plot analysis of the magnetization. The Curie temperature T-C is suppressed to zero temperature for Nb concentration x(C)=0.083 +/- 0.002, while the spontaneous moment vanishes linearly with T-C as predicted by the Stoner theory. The initial susceptibility chi displays critical behavior for x x(C). The resulting magnetic phase diagram shows that the quantum critical behavior extends over the widest range of temperatures for x=x(C), and demonstrates how a finite transition temperature ferromagnet is transformed into a paramagnet, via a quantum critical point.