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Heterogeneous spacers for CPP GMR stacks

  • US 6,686,068 B2
  • Filed: 02/21/2001
  • Issued: 02/03/2004
  • Est. Priority Date: 02/21/2001
  • Status: Expired due to Fees
First Claim
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1. A current-perpendicular-to-plane (CPP) magnetoresistive sensor comprising:

  • a) at least two magnetic layers; and

    b) at least one heterogeneous spacer layer disposed between the two magnetic layers, wherein the heterogeneous spacer layer is made of a heterogeneous material which is composed of conductive grains within a highly resistive matrix, and wherein the heterogeneous spacer layer substantially increases resistance of the CPP magnetoresistive sensor without reducing magnetoresistance thereof, the content of the conductive grains in the heterogeneous spacer layer being between about 0.1 volume % and about 50 volume %.

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