Structural Transformation of MnAs1-xSbx under High Magnetic Fields
Structural Transformation of MnAs1-xSbx under High Magnetic Fields
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高磁场下 MnAs1-xSbx 的结构转变
DOI：
10.2320/matertrans.45.311
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发表时间：
2004
影响因子：
1.2
通讯作者：
H. Wada
中科院分区：
文献类型：
--
作者：
F. Ishikawa;K. Koyama;Kazuo Watanabe;T. Asano;H. Wada
磁场诱导MnAs和MnAs 0 . 9 Sb 0 . 1在高达5T的强磁场中进行了X射线衍射测量。在319K的X射线衍射谱中，零场下的MnAs为单相的正交MnP型结构，施加3T的磁场后，出现了六方的NiAs型结构。在磁场的进一步增加，与六方结构的单相被证实在3.5 T以上的强制铁磁状态。在295 K的X射线衍射谱MnAs 0。9 Sb 0 . 1的NiAs薄膜具有六方NiAs型结构。而在2.5T的磁场中，两种不同晶格参数的NiAs型结构共存。零磁场下的温度变化测量也证实了两相共存。铁磁相的晶格体积比顺磁相的晶格体积大1.1%。这些结果表明，在T C的转变MnAs 0。9 Sb 0 . 1是第一阶的。
Structural transformation induced by magnetic fields on MnAs and MnAs 0 . 9 Sb 0 . 1 was investigated by the X-ray diffraction measurements in high magnetic fields up to 5 T. The X-ray diffraction profiles at 319K for MnAsshowed a single phase of the orthorhombic MnP-type structure in zero field, and applying a magnetic field of 3 T caused an appearance of the hexagonal NiAs-type structure. On further increase of magnetic fields, the single phase with the hexagonal structure was confirmed above 3.5 T in a forced ferromagnetic state. The X-ray diffraction profiles at 295 K for MnAs 0 . 9 Sb 0 . 1 showed the hexagonal NiAs-type structure. However, the coexistence of two kinds of the NiAs-type structure with different lattice parameters was confirmed in the magnetic field of 2.5 T. The two phase coexistence was also confirmed in the temperature variation measurements in zero magnetic field. The lattice volume of the ferromagnetic phase was 1.1% larger than that of the paramagnetic phase. These results imply that the transition at T C for MnAs 0 . 9 Sb 0 . 1 is of the first-order.
MnAs 中的场诱导结构转变
DOI：
--
发表时间：
2003
期刊：
Jpn.J.Appl.Phys.part2 42・8A
影响因子：
--
作者：
F.Ishikawa et al.
通讯作者：
F.Ishikawa et al.