The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 05, 2004
Filed:
Nov. 21, 2002
Japan Science and Technology Agency, Kawaguchi, JP;
Abstract
The present invention provides a supermagnetostrictive alloy capable of providing a larger shift (lager magnetostriction) with excellent workability, which is applicable to an actuator in response to advances in downsizing of electronic devices and upgrading of medical instruments and production apparatuses. The supermagnetostrictive alloy has a degree of order of 0.6 to 0.95 achieved by subjecting Fe Pt (−0.02≦×≦0.2) to a heat treatment. The present invention also provides a method for the preparation of a supermagnetostrictive alloy having a magnetostriction of 0.3% or more, particularly 0.5% or more, comprising the steps of subjecting the Fe Pt alloy of a raw material to a homogenization annealing, and then subjecting the resulting product to a heat treatment at 700 to 1000 K for 0.5 to 600 hours.