Effect of dysprosium and cobalt on the temperature dependence of magnetization and phase composition of a material of the Nd-Dy-Fe-Co-B system

Sintered magnetically hard materials with composition (Nd^sub 1-x^Dy^sub x^)^sub 13-16^(Fe^sub 1-y^Co^sub y^)^sub res^Al^sub 0.5-1^B^sub 7-9^ (x = 0.11-0.71, y = 0.19-0.34) are investigated. The role of cobalt and dysprosium in the variation of magnetic properties of the material (residual induction, coercive force) is studied. The phase composition of the material and its effect on magnetic properties are determined. Amethod for computing the induction temperature coefficient of a material on the basis of published data on the physical characteristics (the Curie temperature, the density, the molecular mass) of the main magnetic phase (Nd, Dy)^sub 2^(Fe, Co)^sub 14^B is presented.[PUBLICATION ABSTRACT]