Magnetoresistance film which is a matrix of at least two specifi

Details Magnetoresistance film which is a matrix of at least two specifi Magnetoresistance film which is a matrix of at least two specifi

1995-06-30

1997-01-14

Resan, Stevan A.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428548, 428553, 428611, 428692, 428928, H01F 1012

Patent

active

055949339

ABSTRACT:
The invention relates to a magnetoresistance material, i.e. a conductive material that exhibits magnetoresistance, which is an inhomogeneous system consisting of a nonmagnetic matrix and ultrafine particles of a ferromagnetic material such as Co or Ni--Fe--Co dispersed in the nonmagnetic matrix. With the aim of reducing deterioration of the magnetoresistance effect, an alloy or mixture of at least two metal elements selected from Cu, Ag, Au and Pt is used as the material of the nonmagnetic matrix. Optionally, the nonmagnetic matrix may contain a limited quantity of a supplementary element selected from Al, Cr, In, Mn, Mo, Nb, Pd, Ta, Ti, W, V, Zr and Ir. A film of the magnetoresistance material can be formed on a substrate, and it is optional to interpose a buffer layer between the film and the substrate and/or cover the film with a protective layer.

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John Q. Xiao et al., "Giant Magnetoresistance in Nonmultilayer Magnetic Systems", Physical Review Letters, vol. 68, No. 25, pp. 3749-3752 (Jun. 22, 1992).
A. E. Berkowitz et al., "Giant Magnetoresistance in Heterogeneous Cu-Co Alloys", Physical Review Letters, vol. 68, No. 25, pp. 3745-3748 (Jun. 22, 1992).
M. L. Watson et al., "Observation of giant magneto-resistance in Ag-Ni-Fe alloy films", J. Appl. Phys., vol. 73, No. 10, pp. 5506-5508 (May 15, 1993).
H. Takeda et al., "Magnetoresistance of nano-granular noble-metal based alloys", Japan Applied Magnetics Soc., Synopses of Lectures in 17th Meeting (19993) 11aA-5, p. 136.

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