Magnetic properties of Ge substituted Ru2FeSi alloys
Magnetic properties of Ge substituted Ru2FeSi alloys
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DOI：
10.1016/j.jmmm.2013.07.058
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发表时间：
2013-12
影响因子：
2.7
通讯作者：
Bhargab Deka;R. Das;A. Srinivasan
中科院分区：
文献类型：
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作者：
Bhargab Deka;R. Das;A. Srinivasan
本文对电弧熔炼法合成的Ru_2FeSi合金中Ge的替代进行了系统的研究。使用Rietveld精修技术的晶体学分析表明，在室温下，0≤x≤1 mol%的所有Ru2Fe（Si1−xGex）合金的组成都表现出立方B2结构，晶胞体积从203.3增加到212.8 × 3asx从0增加到1 mol%。在Heusler（X2YZ）化合物中，由于Y和Z位的部分无序，出现B2结构。磁化强度测试表明，Ru_2FeSi为反铁磁性，其Neel温度为270 K。取代Ge在Si网站的铁磁性的发展所示的磁化强度和磁化率数据收集的样品。居里温度随x从0.25增加到1.00 mol%而从354 K增加到460 K，表明随着x的增加，四元合金中铁磁态占主导地位。
A systematic study of Ge substitution in Ru2FeSi alloys synthesized by the arc melting method is presented in this work. Crystallographic analysis using the Rietveld refinement technique reveals that at room temperature, all compositions of Ru2Fe(Si1−xGex) alloys with 0≤x≤1 mol%, exhibit cubic B2 structure with unit cell volume increasing from 203.3 to 212.8 Å3asxwas increased from 0 to 1 mol%. B2 structure occurs in Heusler (X2YZ) compounds due to partial disorder in the Y and Z sites. Magnetization measurements showed that Ru2FeSi is antiferromagnetic with Neel temperature of 270 K. Substitution of Ge in Si sites resulted in the development of ferromagnetism as indicated by magnetization and magnetic susceptibility data collected on the samples. Curie temperature increased from 354 K to 460 K asxwas increased from 0.25 to 1.00 mol%, which shows that the ferromagnetic state becomes dominant asxis increased in the quaternary alloys.