Amorphous alloy for strip-shaped sensor elements

• US 5,037,494 A
• Filed: 05/15/1990
• Issued: 08/06/1991
• Est. Priority Date: 05/21/1987
• Status: Expired due to Term

• Current Assignee: Vacuumschmelze GmbH & Company KG (Vectra Corp.)
• Original Assignee: Vacuumschmelze GmbH & Company KG (Vectra Corp.)
• Inventors: Herzer, Giselher, Hilzinger, Hans R.
• Primary Examiner(s): Sheehan, John P.
• Application Number:
  US07/523,176
• Time in Patent Office: 448 Days
• Field of Search: 148/304, 148/403, 420/435, 420/440, 420/441, 420/452, 420/459
• US Class Current: 148/304
• CPC Class Codes: C22C 45/04 with nickel or cobalt as the major constituent
• CPC Class Codes: G08B 13/2411 Tag deactivation
• CPC Class Codes: G08B 13/2442 Tag materials and material properties thereof, e.g. magnetic material details
• CPC Class Codes: H01F 1/15316 based on Co H01F1/15325 takes precedence

Abstract

An amorphous alloy free of magnetostriction is employed in anti-theft labels, magnetic field detectors or the like, having a saturation induction of B_s ≦0.5T and a good responsiveness given an annealing treatment in the magnetic field for achieving a remanance relationship of B_r /B_s >0.6.

Claims

1. A heat treated amorphous alloy for strip-shaped sensor elements having low saturation induction, being free of magnetostriction, having a saturation induction of B_s ≦

0.5 T and having responsiveness in an annealing treatment in a magnetic field for achieving a remanence relationship of B_r /B_s <

0.06 having the formula Co_100-u-x-y-z Fe_u Ni_x (Nb+T)_y (Si+B)_z wherein u=4 through 10 At. %, x=20 through 50 At. %,y=0 through 18 At. %,z=5 through 30 At. %, x+5.3y+4.1z-0.73 u=120 through 135, z+y>

20 At. %, Nb+B>

6 At. % and T=0 through 3 At. % of an element selected from the group consisting of Mo, Cr, V, Zr, Ti, W or a mixture of the elements in said group.

2. An amorphous alloy as claimed in claim 1, wherein u =4 through 10 At. %, x=20 through 45 At. %, y=0 through 4 At. %, z=20 through 30 At. % and x+5.3 y+4.1 z-0.73 u=120 through 130.

3. An amorphous alloy as claimed in claim 1, wherein u=4 through 10 At. %, x=20 through 30 At. %, y=12 through 18 At. %, z=5 through 12 At. % and x+5.3 y+4.1 z-0.73 u=120 through 130.

4. An amorphous alloy as claimed in claim 2, wherein u=4 through 10 At. %, x=35 through 45 At. %, y=0 through 1 At. %, and z=21 through 23 At. %.