论文标题
根据自旋 - 拖延理论的定位5F电子的定位和对磁性的压力对磁性的效果
Localization of 5f-electrons and pressure effects on magnetism in U intermetallics in the light of spin-fluctuation theory
论文作者
论文摘要
UCOGA和URHGA，两种同源化合物表现出居里温度对施用静液压预发作的初始响应的迹象。为了确定这种矛盾的物理起源，在高桥的自旋 - 裂开理论的框架中分析了根据温度，磁场和静水压力测量的磁化数据。参数T0和TA表征了能量和波矢量空间中自旋 - 裂开光谱的分布宽度和TC/T0的参数，已经确定了5F-电子定位的程度。检查具有Zrnial型结构的其他UTX的可用实验数据（t = t = t = a = al，ga）的铁磁体，发现5F-电子定位的程度与旋转裂开参数表示的5F电子定位程度与curie-temper的响应在施加压力上的响应之间存在一些相关性。这些观察结果可以更普遍地描述大多数铀铁磁化合物的定位和磁性行为。
UCoGa and URhGa, two isostructural compounds show opposite signs of the initial response of Curie temperature to applied hydrostatic premenssure. To determine the physical origin of this contradiction the magnetization data measured with respect to temperature, magnetic field and hydrostatic pressure were analyzed in the framework of the Takahashi's spin-fluctuation theory. The parameters T0 and TA characterizing the distribution widths of the spin-fluctuation spectrum in the energy and wave vector space, respectively, and TC/T0, the degree of the 5f-electron localization have been determined. Examination of available experimental data for the other UTX (T = a transition metal, X = Al, Ga) ferromagnets having the ZrNiAl-type structure revealed some correlations between the degree of the 5f-electron localization represented by the spin-fluctuation parameters and the response of Curie-temperature on the applied pressure. These observations may be applied more generally to describe the localization and magnetic behaviors of the majority of the uranium ferromagnetic compounds.
