Noise Measurement of Interacting Ferromagnetic Particles with High Resolution Hall Microprobes
classification
❄️ cond-mat.dis-nn
keywords
hallmagneticmicroprobesnoiseagreecurrentdeterminationexperimental
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We present our first experimental determination of the magnetic noise of a superspinglass made of < 1 pico-liter frozen ferrofluid. The measurements were performed with a local magnetic field sensor based on Hall microprobes operated with the spinning current technique. The results obtained, though preliminary, qualitatively agree with the theoretical predictions of Fluctuation-Dissipation theorem (FDT) violation [1].
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