Rare earth-cobalt supermagnetostrictive alloy

Details Rare earth-cobalt supermagnetostrictive alloy Rare earth-cobalt supermagnetostrictive alloy

1993-11-29

1996-10-15

Sheehan, John

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Magnetostrictive-type device

148301, 420 83, 420416, 420435, 310 25, H01F 700

Patent

active

055658300

ABSTRACT:
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.ltoreq.x.ltoreq.0.8, 0.2.ltoreq.z.ltoreq.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.ltoreq.x.ltoreq.0.8, 0.2.ltoreq.z.ltoreq.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.

REFERENCES:
patent: 4308474 (1981-12-01), Savage et al.
patent: 4374665 (1983-02-01), Koon
patent: 4378258 (1983-03-01), Clark et al.
patent: 4885134 (1989-12-01), Hatwar
patent: 4946501 (1990-08-01), Nate et al.
patent: 4957549 (1990-09-01), Matsumoto et al.

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