Thermal expansion anomaly and spontaneous magnetostriction of Tb2Fe15Cr2 compound

被引：0
作者：
HAO Yanming
机构：
来源：
RareMetals | 2006年 / 02期
基金：
中国国家自然科学基金;
关键词：
condensed matter physics; spontaneous magnetostriction; X-ray diffraction; Tb2Fe15Cr2; compound; negative thermal expansion;
D O I：
暂无
中图分类号：
TB331 [金属复合材料];
学科分类号：
0805 ; 080502 ;
摘要：
The structural and magnetic properties of Tb2Fe15Cr2 compound were investigated by means of X-ray diffraction and magnetization measurements. Tb2Fe15Cr2 compound has a hexagonal Th2Ni17-type structure. Negative thermal expan- sion was found in Tb2Fe15Cr2 compound from 372 to 452 K by X-ray dilatometry. The coefficient of the average thermal expansion is α = ? 3.14 ×1 0?5K?1. The magnetostrictive deformations from 292 to 450 K were calculated. The result showed that the spontaneous volume magnetostrictive deformation ωS remains nearly constant with increasing temperature up to 360 K, but decreases with the further increase of temperature. The spontaneous linear magnetostrictive deformation λc along the c axis decreases with increasing temperature. The spontaneous linear magnetostrictive deformation, λa, in the basal-plane increases with increasing temperature up to 360 K, but decreases with further increasing temperature.
引用
收藏
页码：156 / 160
页数：5
相关论文
共 5 条
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