The spin configuration and magnetostrictive properties of TbxDy0.7-xPr0.3(Fe0.9B0.1)1.93(0.10 ≤ ≤ 0.28) Laves compounds are investigated. The spin phase diagram for the compounds is constructed to illustrate both the composition dependence of the Curie point Tcand spin reorientation temperature TSRand the arrangement for the easy magnetization direction (EMD). It is found that when x is increased from 0.16 to 0.28, Tcincreases from 617 to 623 K, while TSRdecreases from 375 to 160 K at which the EMD reorients from (100) to (111) axis. The magnetization and magnetostriction of the compounds are measured as a function of applied field. The magnetocrystalline anisotropy constant K1and the ratio λa/K1reach a minimum and a maximum value at x=0.22, respectively. The single phase Tb0.22Dy0.48Pr0.3(Fe0.9B0.1)1.93compound has the lowest magnetocrystalline anisotropy, the highest magnetostriction to anisotropy ratio, and a large spontaneous magnetostriction λ111of ∼1500 ppm at room temperature. In view of these properties, the compound is a promising magnetostrictive material.
ASJC Scopus subject areas
- Physics and Astronomy(all)