Noise Measurement of Interacting Ferromagnetic Particles with High Resolution Hall Microprobes

Details Noise Measurement of Interacting Ferromagnetic Particles with High Resolution Hall Microprobes Noise Measurement of Interacting Ferromagnetic Particles with High Resolution Hall Microprobes

2010-01-11

arxiv.org/abs/1001.1637v1

AIP Conf. Proc., 1129, 153-156 (2009)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4pages, 2 figures

Scientific paper

10.1063/1.3140418

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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