Noise Measurement of Interacting Ferromagnetic Particles with High Resolution Hall Microprobes

Abstract : We present our first experimental determination of the magnetic noise of a superspin‐glass made of <1 pico‐liter<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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Submitted on : Thursday, November 10, 2016 - 11:00:53 AM
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K. Komatsubara, D. l'Hote, S. Nakamae, F. Ladieu, V. Mosser, et al.. Noise Measurement of Interacting Ferromagnetic Particles with High Resolution Hall Microprobes. AIP Conference Proceedings, American Institute of Physics, 2009, ⟨10.1063/1.3140418⟩. ⟨cea-01394945⟩

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