Quantitative analysis of the giant magnetoresistance effect at microwave frequencies

Daniel E. Endean, James N. Heyman, Stefan Maat, E. Dan Dahlberg

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The high-frequency analog of giant magnetoresistance (GMR) in the microwave reflection and transmission coefficients of spin valves was measured and quantified. The relative change in transmission is nearly a factor of 2 larger than the electrical transport GMR effect. The change in reflection is of opposite sign and an order of magnitude smaller. A calculation of the reflection and transmission coefficients, considering the interfaces and the decay of the fields within the layers, provides a quantitative relationship to the transport GMR with no free parameters.

Original languageEnglish (US)
Article number212405
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number21
StatePublished - Dec 19 2011


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