P
Pierre Beauvillain
Researcher at University of Paris-Sud
Publications - 89
Citations - 2239
Pierre Beauvillain is an academic researcher from University of Paris-Sud. The author has contributed to research in topics: Magnetization & Magnetic anisotropy. The author has an hindex of 25, co-authored 89 publications receiving 2160 citations. Previous affiliations of Pierre Beauvillain include Centre national de la recherche scientifique.
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Ferromagnetic resonance studies of very thin cobalt films on a gold substrate.
TL;DR: Ferromagnetic resonance measurements in Co films of 11.3, 20, and 80 A\r{} thickness sandwiched by Au have been made as a function of the dc magnetic field orientation in a plane perpendicular to the film.
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Microscopic origin of magnetic anisotropy in Au/Co/Au probed with x-ray magnetic circular dichroism.
Dieter Weller,Joachim Stöhr,R. Nakajima,A. Carl,Mahesh G. Samant,Claude Chappert,R. Mégy,Pierre Beauvillain,P. Veillet,G. A. Held +9 more
TL;DR: In this paper, high-field, angle-dependent x-ray magnetic circular dichroism measurements on a Au/Co-staircase/Au structure reveal an anisotropy in the dichromism intensities parallel and perpendicular to the film plane, related to the anisotropies of the spin density within the Wigner-Seitz cell and of the orbital magnetic moment, both increasing with decreasing Co thickness.
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Hysteresis properties of ultrathin ferromagnetic films
Patrick Bruno,Günther Bayreuther,Pierre Beauvillain,Claude Chappert,G. Lugert,D. Renard,Julien Renard,J. Seiden +7 more
Abstract: We have investigated the hysteresis properties of Au/Co/Au films with ultralow Co thicknesses and perpendicular easy axis. At low temperature we observe a very strong thickness dependence of the coercivity, whereas striking dynamical effects are present at room temperature. We propose a model of wall motion which provides a consistent explanation of the overall observations. This interpretation emphasizes the crucial role played by the roughness with respect to the hysteresis properties of ferromagnetic ultrathin films.We have investigated the hysteresis properties of Au/Co/Au films with ultralow Co thicknesses and perpendicular easy axis. At low temperature we observe a very strong thickness dependence of the coercivity, whereas striking dynamical effects are present at room temperature. We propose a model of wall motion which provides a consistent explanation of the overall observations. This interpretation emphasizes the crucial role played by the roughness with respect to the hysteresis properties of ferromagnetic ultrathin films.
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Unambiguous evidence of oscillatory magnetic coupling between Co layers in ultrahigh vacuum grown Co/Au(111)/Co trilayers.
V. Grolier,D. Renard,Bernard Bartenlian,Pierre Beauvillain,Claude Chappert,C. Dupas,Jacques Ferré,M. Galtier,E. Kolb,M. Mulloy,Julien Renard,P. Veillet +11 more
TL;DR: The first direct evidence of oscillatory coupling in Co/Au(111)/Co trilayers grown in ultrahigh vacuum is reported and is in good agreement with theoretical predictions.
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Very large magnetoresistance effects induced by antiparallel magnetization in two ultrathin cobalt films
C. Dupas,Pierre Beauvillain,Claude Chappert,Julien Renard,F. Trigui,P. Veillet,E. Vélu,D. Renard +7 more
TL;DR: Au/Co/Au multilayers in which the two ultrathin cobalt films have perpendicular magnetizations and different coercive fields Hc1 and Hc2 due to their different thicknesses are studied in this article.