Galvanomagnetic Effects in Ferromagnetic Resonance

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Abstract
The dc voltage generated across the surface of a thin ferromagnetic film during ferromagnetic resonance is described. The effect has been analyzed in terms of the combined action of the extraordinary Hall effect and a magnetoresistance effect. The dc character arises from the dependence of the voltage on double products of microwave fields. Data are presented, and it is shown that the theory gives the proper order of magnitude of the effect. Also, the experimental voltage versus steady magnetic field curves show that the extraordinary Hall effect plays the principal role. The voltage provides a new and sensitive means of studying ferromagnetic resonance effects in thin films.

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