Hysteresis reduction in giant magnetostrictive materials

US6300855A · kind A · utility

Assignee

• United States of America as represented by the Secretary of the Air Force · US

Inventors

• Arthur E. Clark · Adelphi, US
• James B. Restorff · College Park, US
• Marilyn Wun-Fogle · Potomac, US

Key dates

• Filing date: Dec 21, 1998
• Grant date: Oct 9, 2001
• Expiry date: Dec 21, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N35/85

Abstract

A high power magnetostrictive transducer element comprising a material of the formula Tb.sub.x Dy.sub.y Ho.sub.z Fe.sub.2-w wherein 0.24.ltoreq.x.ltoreq.0.28, 0.52.ltoreq.y.ltoreq.0.56, 0.13.ltoreq.z.ltoreq.0.22, x+y+z=1, and 0.ltoreq.w.ltoreq.0.20 and wherein the material is prestressed by a compressive force of from about 5 to about 100 MPa.