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Theses

Oscillations magnétiques et domaines de Condon dans des métaux

Roman Kramer 1
1
LCMI-GHMFL - Laboratoire des champs magnétiques intenses
Abstract : In this thesis, diamagnetic domains called “Condon domains” are investigated. The origin of these domains is the Landau quantization of the electron energy states in a magnetic field leading to the de Haas-van Alphen (dHvA) effect. Here, for the first time, the Condon domain structure is detected at the surface of a silver sample with a local magnetic field probe. Magnetic field changes of the order of 1e-4 are resolved with an array of micro Hall probes on length scales of some ten micrometers. The domain period and the domain wall thickness are estimated. Furthermore, hysteresis is observed in the dHvA effect in the Condon domain state. The hysteresis loop is identified using DC Hall probes and a standard AC modulation field technique. The detection of the hysteresis with the AC technique offered a highly sensitive method by which experimental phase diagrams of the Condon domain state are determined for silver and beryllium samples.
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Theses
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https://tel.archives-ouvertes.fr/tel-00011710
Contributor : Roman B. G. Kramer <>
Submitted on : Thursday, March 2, 2006 - 10:50:35 AM
Last modification on : Thursday, January 11, 2018 - 6:27:31 AM
Long-term archiving on: : Saturday, April 3, 2010 - 10:40:18 PM

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  • HAL Id : tel-00011710, version 1

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UJF | CNRS

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Roman Kramer. Oscillations magnétiques et domaines de Condon dans des métaux. Condensed Matter [cond-mat]. Université Joseph-Fourier - Grenoble I, 2005. English. ⟨tel-00011710⟩

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