Spontaneous magnetostriction of the HeDy2AIFe8Mn8 compound
The thermal expansion behaviors of the unit-cell volume of the Dy2AIFe8Mn8 compound from 104 to 643K and its spontaneous magnetostrictions are investigated by means of x-ray dilatometry and magnetization measurements. The results show that there exists a negative thermal expansion in the temperature range 150-230K. The average coefficient of the thermal expansion is α=-5.36×10-5K-1. The spontaneous magnetostrictive deformations from 104 to 235K have been calculated. The results show that the spontaneous volume magnetostrictive deformation ωs increases from 4.4×10-3 at 104K to 7.1×10-3 at 150K with the temperature increasing, and then decreases with the temperature increasing further. The spontaneous linear magnetostrictive deformation λc along the c-axis decreases with the temperature increasing while deformation in the basal-plane λa increases from 0.9×10-3 at 104K to 2.4×10-3 at 145K with the temperature increasing and then decreases with the temperature increasing further.
Yanming Hao Yan Zhou Miao Zhao Bin Fu DaLi Yan
College of Science, Tianjin University of Science Technology, 13th Street, Teda, Tianjin 300457, Peo Department of Physics, Tianjin Normal University, Tianjin 300074, Peoples Republic of China
国际会议
第二届功能原料国际研讨会(The 2rd International Symposium on Functional Materials)
杭州
英文
265-267
2007-05-16（万方平台首次上网日期，不代表论文的发表时间）