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Perpendicular Giant Magnetoresistance of Co/Cu Multilayers with Fluctuating Co Layer Thicknesses

Published online by Cambridge University Press:  15 February 2011

Wen-C. Chiang ,
R. Loloee ,
W.P. Pratt Jr  and
J. Bass
Wen-C. Chiang
Affiliation:
Department of Physics and Astronomy, Center for Fundamental Materials Research, and Center for Sensor Materials, Michigan State University, East Lansing, MI 48824, bass@pa.msu.edu
R. Loloee
Affiliation:
Department of Physics and Astronomy, Center for Fundamental Materials Research, and Center for Sensor Materials, Michigan State University, East Lansing, MI 48824, bass@pa.msu.edu
W.P. Pratt Jr
Affiliation:
Department of Physics and Astronomy, Center for Fundamental Materials Research, and Center for Sensor Materials, Michigan State University, East Lansing, MI 48824, bass@pa.msu.edu
J. Bass
Affiliation:
Department of Physics and Astronomy, Center for Fundamental Materials Research, and Center for Sensor Materials, Michigan State University, East Lansing, MI 48824, bass@pa.msu.edu
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Abstract

J. Mathon has predicted that introducing pseudorandom fluctuations (PRF) in the Co layer thickness could greatly enhance the Current Perpendicular to the Plane (CPP) magnetoresistance (MR) of a Co/Cu superlattice with dimensions comparable to the electron mean-free-path. We have searched for CPP-MR enhancement in sputtered Co/Cu multilayers with Cu layer thicknesses near both the first and second antiferromagnetically coupled peaks in the oscillatory region of the CPP-MR. In both cases, inserting PRF only decreased the CPP-MR.

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References

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