Magnetostriction of Tb_(0.5)Dy_(0.5)Fe_(2-x)M_x Laves Phase Compounds (M=Co, Ni, Mn, Zn, Cu, Cr)

摘要

The magnetostrictive properties ofTb_(0.5)Dy_(0.5)Fe_(2-x)M_x Laves phase compounds (M =Co, Ni, Mn, Zn, Cu, Cr) were examined. In various compounds,substitution of Zn and Ni brought about a reduction of the pre-stress dependence on magnetostriction, and the magnetostrictionincreased to more than 800 ppm in a lower magnetic field of 80kA/m under a larger compressive pre-stress of 40 MPa. In Th-Dy-Fe-Zn compounds, which showed the best magnetostrictiveproperties, changes in the Curie temperature, lattice spacing, andspin re-orientation temperature of the Laves phase wereobserved with increasing Zn content.