Thermal expansion anomaly and spontaneous magnetostriction of Dy_2AlFe_(14)Mn_2 compound

• 作 者: 王海云 赵淼 高艳 周严 傅斌 严达利
• 机 构: School of Materials Science and Technology Hebei University of Technology,Department of Physics,Tian
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2006年06期
• 关键词: spontaneous magnetization anomaly diffractometer paramagnetic maybe cubic graphi

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.

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 were. The results show that the spontaneous volume magnetostrictive distortion increases firstly with increasing temperature, and then decreases with further increasing temperature .