【摘要】 本文根据应力各向异性、磁晶各向异性和磁矩转动技术磁化过程的原理，计算了不同取向单晶体的磁致伸缩应变理论值。在理想条件下，〈１１１〉轴向取向晶体的磁致伸缩性能最好；〈１１０〉和〈１１２〉取向性能相同，都比〈１１１〉稍差；〈１１３〉取向的性能最差；同时测量了低场下不同取向Ｔｂ－Ｄｙ－Ｆｅ多晶体的磁致伸缩性能，发现在低场下，〈１１０〉取向多晶体的磁致伸缩性能比〈１１２〉取向多晶体和〈１１１〉取向单晶体的磁致伸缩系数略高更多还原

【Abstract】 This paper calculated the magnetostrictive strains of single crystal Tb-Dy-Fe alloy with respect to several crystal orientations,111,110,112 and 113,based on the theory of stress anisotropy,magnetocrystalline anisotropy and technological magnetization. On the ideal situation,the magnetostriction of 111 crystal axial orientation sample was the best,both of 110 and 112 were a little lower than that of 111 and 113 crystal axial orientation sample was the worst.According to the experiments,we found that the magnetostriction of the 110 axial aligned polycrystal at low magnetic field less than 80kA/m was better than that of the 112 polycrystal and the 111 single crystal.更多还原