Patent · US Expired

Amorphous alloys for magneto-acoustic markers in electronic article surveillance having reduced, low or zero co-content and method of annealing the same

US6645314B1 · kind B1 · utility

10Cited by

14References

14Claims

0Family size

Assignees

Vacuumschmelze GmbH & Co. KG · DE
Sensormatic Electronics, LLC · US

Inventors

Giselher Herzer · Bruchköbel, DE
Nen-Chin Liu · Coral Springs, US

Key dates

Filing date	Oct 2, 2000
Grant date	Nov 11, 2003
Priority date	—
Expiry date	Oct 2, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH01F1/15341
WIPO fieldControl
WIPO sectorInstruments

Abstract

A ferromagnetic resonator for use in a marker in a magnetomechanical electronic article surveillance system is manufactured at reduced cost by being continuously annealed with a tensile stress applied along the ribbon axis and by providing an amorphous magnetic alloy containing iron, cobalt and nickel and in which the portion of cobalt is less than about 4 at %.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.