Magnetostrictive properties and microstructure of Tb–Dy–Fe alloy with <1 1 3> crystal orientation

High magnetostrictive strain has been obtained in Tb 0.3 Dy 0.7 Fe 1.98 polycystalline samples with crystal orientation. The λ 40 and λ 80 values are 1250 and 1550 ppm, respectively under a pressure of 6 MPa, which is better than that of samples with crystal orientation. The observed morphologies indicate that the grains with axial orientation grow in the form of sheet-like cellular crystals. A rare-earth rich phase (R = Tb, Dy), is distributed along the boundaries of the cellular crystals. The excellent magnetostrictive properties are related to the microstructure of the material.