Rare earth-iron magnetostrictive materials and devices using the

Details Rare earth-iron magnetostrictive materials and devices using the Rare earth-iron magnetostrictive materials and devices using the

1979-11-14

1981-12-29

Budd, Mark O.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

75123E, H01L 4120, H04B 1100

Patent

active

043084745

ABSTRACT:
Grain-oriented polycrystalline or single crystal magnetostrictive materials n the general formula Tb.sub.x Dy.sub.1-x Fe.sub.2-w, Tb.sub.x Ho.sub.1-x Fe.sub.2-w, Sm.sub.x Dy.sub.1-x Fe.sub.x-w, Sm.sub.x Ho.sub.1-x Fe.sub.2-w, Tb.sub.x Ho.sub.y Dy.sub.z Fe.sub.2-w, or Sm.sub.x Ho.sub.y Dy.sub.z Fe.sub.2-w, wherein O.ltoreq.w.ltoreq.0.20, and x+y+z=1. X, y, and z are selected to maximize the magnetostrictive effect and the magnetomechanical coupling coefficient K.sub.33. These material may be used in magnetostrictive transducers, delay lines, variable frequency resonators, and filters.

REFERENCES:
patent: 3102002 (1963-08-01), Wallace et al.
patent: 3869683 (1975-03-01), Sokoloski
patent: 3949351 (1976-04-01), Clark et al.
patent: 4078186 (1978-03-01), Folen et al.
patent: 4158368 (1979-06-01), Clark

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