Thermal expansion anomaly and spontaneous magnetostriction of Dy₂AlFe₁₄Mn₂ compound

来源期刊：中国有色金属学报(英文版)2006年第6期

论文作者：王海云 赵淼 高艳 周严 傅斌 严达利

文章页码：1331 - 1334

Key words：Dy₂AlFe₁₄Mn₂ compound; thermal expansion; spontaneous magnetostriction; negative thermal expansion

Abstract: The structure and magnetic properties of Dy₂AlFe₁₄Mn₂ compound were investigated by X-ray diffractometry and magnetization measurements. Dy₂AlFe₁₄Mn₂ compound has a hexagonal Th₂Ni₁₇-type structure. Zero thermal expansion and negative thermal expansion were found in Dy₂AlFe₁₄Mn₂ compound in the temperature range from 184 to 264 K, and from 264 to 383 K, respectively, by X-ray dilatometry. The spontaneous magnetostrictive deformations from 104 to 400 K were calculated. The results show that the spontaneous volume magnetostrictive deformation increases firstly with increasing temperature, and then decreases with further increasing temperature.

基金信息：the National Natural Science Foundation of China
the Excellent Yong Teachers Program of MOE
the Natural Science Foundation of Tianjin City, China