Magnetic noise of a frozen ferrofluid

K. Komatsu; D. l'Hote; S. Nakamae; F. Ladieu; V. Mosser; A. Kerlain; M. Konczykowski; E. Dubois; V. Dupuis; R. Perzynski

doi:10.1063/1.3366613

Journal articles

Magnetic noise of a frozen ferrofluid

K. Komatsu ¹ D. l'Hote ^{1, 2} S. Nakamae ¹ F. Ladieu ^{1, 2} V. Mosser ³ A. Kerlain ³ M. Konczykowski ⁴ E. Dubois ⁵ V. Dupuis ⁵ R. Perzynski ⁵

1 SPHYNX - Systèmes Physiques Hors-équilibre, hYdrodynamique, éNergie et compleXes

SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay

2 SPEC - UMR3680 - Service de physique de l'état condensé

3 ITRON SAS

4 LSI - Laboratoire des Solides Irradiés

5 PECSA - Physicochimie des Electrolytes, Colloïdes et Sciences Analytiques

Abstract : The magnetic noise of a frozen ferrofluid made of maghemite nanoparticles dispersed in glycerin is measured using a two-dimensional electron gas based quantum well Hall sensor QWHS with the spinning current technique. The frozen ferrofluid shows a superspin glass transition at 67 K. Below this glass transition temperature, the relation between the imaginary part of the ac susceptibility of a bulk ferrofluid sample and the magnetic noise measured with the QWHS gives an indication of a violation of the fluctuation dissipation theorem.

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Journal articles

Domain :

Physics [physics]

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https://hal-cea.archives-ouvertes.fr/cea-01394919
Contributor : Dominique Girard <>
Submitted on : Thursday, November 10, 2016 - 10:38:31 AM
Last modification on : Saturday, September 26, 2020 - 11:44:07 PM
Long-term archiving on: : Wednesday, March 15, 2017 - 3:11:24 AM

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