Dynamic Coupling Coefficient of Directional Solidification Alloy Tb_(0.3)Dy_(0.7)Fe_(1.82)
The 110 and 112 directional-solidification alloys Tb0.3Dy0.7Fe1.82 were prepared, and the effect of magnetic field and stress on the dynamic coupling coefficient of the alloy were investigated. The results show that the dynamic coupling coefficient of the alloy increases first and then decreases with the increase of the magnetic field, and comes to the maximum under the magnetic field of 300~500 Oe. The dynamic coupling coefficient is maximal when applying external stress of 10 MPa, and it decreases when the stress is further increased. The dynamic coupling coefficient of the alloy after heating treatment is 0.62 under the stress of 10 MPa and the magnetic field of 480 Oe.