High-Magnetic Field X-ray Diffraction Studies on Gd5(Ge2 xFex)Si2 (x ¼ 0:05 and 0.2)
High-Magnetic Field X-ray Diffraction Studies on Gd5(Ge2 xFex)Si2 (x ¼ 0:05 and 0.2)
复制标题
Gd5(Ge2 xFex)Si2 (x ¼ 0:05 和 0.2) 的高磁场 X 射线衍射研究
DOI：
10.2320/matertrans.46.2011
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
R. Shull
中科院分区：
文献类型：
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作者：
J. Her;K. Koyama;Kazuo Watanabe;V. Provenzano;A. Fu;A. Shapiro;R. Shull
在磁场强度高达5T的条件下，对Gd 5（Ge 1 . 9 5 Fe 0 . 0 5）Si2和Gd5（Ge1. 8 Fe 0 . 2）Si 2 .与轴承从8 K，矩阵的Gd 5（Ge 1。9 5 Fe 0 .（0 5）Si2在居里温度（TC = 2 76 K）下明显地表现出从正交晶向单斜晶的结构转变。另一方面，Gd 5（Ge 1 . 8 Fe 0 . 2）铁磁态正交结构的Si2在TC = 303K以上表现出正交结构和单斜结构的两相共存，表明少量基体参与了相变。对于这两种样品，单斜结构被抑制，但正交结构被增强，通过施加磁场，这与磁化过程密切相关的TC以上。
We performed the powder X-ray diffraction measurements in magnetic fields up to 5 T for Gd 5 (Ge 1 . 9 5 Fe 0 . 0 5 )Si 2 and Gd 5 (Ge 1 . 8 Fe 0 . 2 )Si 2 . With bearings from 8 K, the matrix of Gd 5 (Ge 1 . 9 5 Fe 0 . 0 5 )Si 2 clearly shows a structural transition from an orthorhombic to a monoclinic structure at the Curie temperature (T C = 276 K). On the other hand, the matrix of Gd 5 (Ge 1 . 8 Fe 0 . 2 )Si 2 with the orthorhombic structure in the ferromagnetic state shows two-phases co-existence of the orthorhombic and the monoclinic structures above T C = 303 K, indicating that a small amount of the matrix participates in the transformation. For both samples, the monoclinic structure is suppressed but the orthorhombic structure is enhanced just above T C by applying a magnetic field, which closely relates to the magnetization process.