Rare earth-cobalt supermagnetostrictive alloy

摘要

A rare earth-cobalt supermagnetostrictive alloy having a composition represented by the general formula, in atomic fraction: R (Co. sub.1-x Fe. sub.x).sub.x, wherein 0.001≦x≦0.8, 0.2≦z≦15, and R is at least one element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu and is consisting essentially of a cubic system whose easy axis of magnetization is generally 100 or 110 oriented; or R (Co.sub.1-x Fe. sub.x).sub.x, wherein 0.001≦x≦0.8, 0.2≦z≦15, and R is at least one element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Er, Yb, and Lu. Such an alloy exhibits satisfactory magnetostriction in a wide range of temperatures from room temperature to liquid nitrogen temperature.