Anisotropic magnetic form factor in a detwinned single crystal of BaFe2As2
Anisotropic magnetic form factor in a detwinned single crystal of BaFe2As2
复制标题
BaFe2As2 解孪晶单晶中的各向异性磁形状因子
DOI：
10.1103/physrevb.90.144510
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
and S. Shamoto
中科院分区：
文献类型：
--
作者：
K. Kodama;M. Ishikado;S. Wakimoto;K. Kihou;C. H. Lee;A. Iyo;H. Eisaki;and S. Shamoto
我们已经进行了中子衍射测量在12 K的单晶，作为母体化合物的铁基超导体。为了研究反铁磁相中磁形状因子的面内各向异性，对单晶进行了去孪晶。磁结构因子和磁形状因子很好地解释了自旋密度，其中电子的分数约为40%，其他四个轨道中的电子的分数约为15%。这是相对于小的斜方晶格畸变的各向异性自旋密度的直接观察。
We have performed neutron diffraction measurements at 12 K on a single crystal of, which serves as the parent compound of iron-based superconductors. To investigate the in-plane anisotropy of the magnetic form factor in the antiferromagnetic phase, the single crystal was detwinned. The magnetic structure factor and magnetic form factor are well explained by the spin densities comprisingelectrons with a fraction of approximately 40% and electrons in the other fourorbitals each with a fraction of approximately 15%. It is a direct observation of the largely anisotropic spin density relative to the small orthorhombic lattice distortion,.