Determination of spin and orbital magnetization in the ferromagnetic superconductor UCoGe
Determination of spin and orbital magnetization in the ferromagnetic superconductor UCoGe
复制标题
铁磁超导体 UCoGe 中自旋和轨道磁化强度的测定
DOI：
10.1103/physrevb.92.121107
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发表时间：
2015
影响因子：
3.7
通讯作者：
Butchers M
中科院分区：
文献类型：
--
作者：
Butchers M
在铁磁超导体UCoGe的磁性已经研究了使用磁康普顿散射，体磁化，X射线磁性圆二色性，和电子结构计算的组合，以确定自旋和轨道矩。实验观察到的总自旋力矩超过5T。通过与总矩的比较，确定轨道矩为。U和Co自旋矩被确定为反平行。我们发现U电子带有的自旋矩为，并且通过杂化引入了Co自旋矩。的比值表明U矩是流动的。为了确保系统性质的准确描述，并提供理论方法的关键测试，显然有必要获得自旋和轨道矩的实验数据，而不仅仅是总磁矩。这可以通过用磁康普顿散射测量自旋矩并将其与体磁化的总矩进行比较来简单地实现。
The magnetism in the ferromagnetic superconductor UCoGe has been studied using a combination of magnetic Compton scattering, bulk magnetization, x-ray magnetic circular dichroism, and electronic structure calculations, in order to determine the spin and orbital moments. The experimentally observed total spin momentwas found to beat 5 T. By comparison with the total moment of, the orbital momentwas determined to be. The U and Co spin moments were determined to be antiparallel. We find that the Uelectrons carry a spin moment ofand that there is a Co spin moment ofinduced via hybridization. The ratio, of, shows the U moment to be itinerant. In order to ensure an accurate description of the properties ofsystems, and to provide a critical test of the theoretical approaches, it is clearly necessary to obtain experimental data for both the spin and orbital moments, rather than just the total magnetic moment. This can be achieved simply by measuring the spin moment with magnetic Compton scattering and comparing this to the total moment from bulk magnetization.