Crystallography, magnetism, and band structure of Mn5Ni2Bi4-type compounds
Crystallography, magnetism, and band structure of Mn5Ni2Bi4-type compounds
复制标题
Mn5Ni2Bi4 型化合物的晶体学、磁性和能带结构
DOI：
10.1103/physrevb.10.120
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发表时间：
1974
影响因子：
3.7
通讯作者：
J. Goodenough
中科院分区：
文献类型：
--
作者：
J. Suits;G. Street;Kenneth K. C. Lee;J. Goodenough
的晶体结构，磁性能，和一个示意性的能带结构已被确定为类型Mn 5 Ni 2 Bi 4的新的磁性化合物类。这类化合物包括Mn 5 Pd 2 Bi 4、Mn 5 Rh 2 Bi 4和Mn 3 Cu 4 Bi 4。结构已计算出与帕特森和差帕特森分析粉末X射线衍射数据的帮助。这些化合物在4.2K下的自发磁矩在50-64 emu/g范围内，居里温度在-7 ℃-183 ℃之间。测量了摩尔居里常数。已经确定了示意性的能带结构模型。它是基于本地网站对称性，包括强相关和巡回d电子。在Heusler和Ni 3 Mn合金，反铁磁耦合的一小部分Mn原子的时刻似乎与原子无序。在原子表观有序度的实验范围内，从能带模型预测的磁化强度和居里常数与实验一致。
The crystal structure, magnetic properties, and a schematic band structure have been determined for the new class of magnetic compounds of the type Mn 5 Ni 2 Bi 4. This class includes Mn 5 Pd 2 Bi 4, Mn 5 Rh 2 Bi 4, and Mn 3 Cu 4 Bi 4. The structure has been calculated with the aid of Patterson and difference Patterson analysis of powder x-ray diffraction data. The spontaneous magnetic moment at 4.2 K for these compounds lies in the range 50-64 emu/g and Curie temperatures range between-7 C and 183 C. Molar Curie constants have been measured. A schematic band-structure model has been determined. It is based on local-site symmetries and includes both strongly correlated and itinerant d electrons. As in the Heusler and Ni 3 Mn alloys, antiferromagnetic coupling of a small percentage of Mn-atom moments appears to be associated with atomic disorder. Within the experimental limits of apparent atomic ordering, the magnetization and Curie constants predicted from the band model are in agreement with experiment.