Magnetic permeability imaging of metals with a scanning near-field microwave microscope

Lee, Sheng-Chiang; Sheng-Chiang Lee; Vlahacos, C. P.; Vlahacos, C.P.; Feenstra, B. J.; Feenstra, B.J.; Schwartz, Andrew; Steinhauer, D. E.; Steinhauer, D.E.; Wellstood, F. C.; Wellstood, F.C.; Anlage, Steven M.
December 2000
Applied Physics Letters;12/25/2000, Vol. 77 Issue 26
Academic Journal
We describe a scanning near-field microwave microscope which uses a loop probe to measure local magnetic properties of metallic samples on a length scale of 200 μm. We demonstrate imaging at 6 GHz through spatiallyresolved ferromagnetic resonance experiments on a single crystal of the colossal magneto-resistive material La[sub 0.8]Sr[sub 0.2]MnO[sub 3]. We find the experimental results are qualitatively and quantitatively well described by a simple model of the system. © 2000 American Institute of Physics.


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