Magnetic properties of MnAs0.7Sb0.3 under high pressure: Comparison with the magnetic moment calculated for MnAs with the NiAs-type structure
Magnetic properties of MnAs0.7Sb0.3 under high pressure: Comparison with the magnetic moment calculated for MnAs with the NiAs-type structure
复制标题
MnAs0.7Sb0.3在高压下的磁性能：与NiAs型结构MnAs计算磁矩的比较
DOI：
10.1016/s0925-8388(01)01359-7
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发表时间：
2001
影响因子：
6.2
通讯作者：
H. Ido
中科院分区：
文献类型：
--
作者：
T. Goto;M. Bartashevich;K. Kondo;K. Terao;H. Yamada;H. Ido
在4.2 ~ 270 K温度范围内，在高达1.2 GPa的高压和高达7 T的强磁场下，测量了具有NiAs型结构的MnAs_（0.7）Sb_（0.3）铁磁材料的磁化强度。居里温度和磁矩的压力依赖性在P=0时非常大（d ln TC/ d P=−0.35 GPa− 1和d ln M/ d P=−0.04 GPa−1）。一个观察到的变磁过渡TCat P=0以上消失的应用程序的高压。采用原子球近似下的线性Muffin-tin轨道方法计算了不同晶格参数下具有NiAs型结构的MnAs的电子结构。磁化强度的计算值强烈依赖于在基面的晶格参数，这是一致的MnAs0.7Sb0.3的观察结果。
The magnetization of ferromagnetic MnAs0.7Sb0.3with the NiAs-type structure has been measured under high pressures up to 1.2 GPa and high magnetic fields up to 7 T in the temperature range from 4.2 to 270 K. The pressure dependencies of the Curie temperature and the magnetic moment are found to be very large (d ln TC/ d P=−0.35 GPa−1and d ln M/ d P=−0.04 GPa−1) at P=0. A metamagnetic transition observed just above TCat P=0 disappears by the application of high pressure. The electronic structure of MnAs with the NiAs-type structure has been calculated by the linear muffin-tin orbital method with the atomic sphere approximation at various lattice parameters. The calculated value of the magnetization depends strongly on the lattice parameter a in the basal plane, which is consistent with the observed results of MnAs0.7Sb0.3.