Patent ID: 7276128

Claim:
A method of annealing a magnetic amorphous alloy article comprising the steps of: (a) providing an unannealed amorphous alloy article having an alloy composition and a longitudinal axis; (b) disposing said unannealed amorphous alloy article in a zone of elevated temperature while subjecting said amorphous alloy to a tensile stress σ along said longitudinal axis to produce an annealed article; and (c) selecting said alloy composition to comprise at least an Fe content larger than about 30 at %, Ni, Si, B and at least one element from the group consisting of Mo and Nb so that dH k /dσ>0, where H k is an induced isotropy field, and so that df r /dH<1000 Hz/Oe, where f r is the resonant frequency of the annealed article and H is a magnetization field strength, and the annealed article has an induced magnetic easy plane perpendicular to said longitudinal axis due to a combination of said composition, said temperature and said tensile stress.