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Universal relationship between giant magnetoresistance and anisotropic magnetoresistance in spin valve multilayers

✍ Scribed by B.H Miller; Branko P Stojković; E.D Dahlberg

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
88 KB
Volume
256
Category
Article
ISSN
0375-9601

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✦ Synopsis

We measure the giant magnetoresistance GMR with the current both parallel and perpendicular to the direction of the Ž . magnetization in the ferromagnetic FM layers and thus probe the anisotropy of the effective mean free paths for the spin-up and spin-down electrons, seen in the anisotropic magnetoresistance. We find that the difference of the GMR in the two configurations, when expressed in terms of the sheet conductance, displays a nearly universal behavior as a function of GMR. On interpreting the results within the Boltzmann transport formalism we demonstrate the importance of bulk scattering for GMR.

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