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Multifunctional Gd2O3:Tm3+, Er3+, Nd3+ particles with luminescent and magnetic properties

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MICROFABRICATED HALL SENSORS ON SU-8 CANTILEVERS

Jürgen Brugger, Giovanni Boero, Radivoje Popovic, Schahrazede-Lila Mouaziz

A technology for the fabrication of bismuth Hall sensors integrated on SU-8 cantilevers has been developed in this project. Hall sensors with active area of 2 x 2 μm2 (Fig.2) are produced with lift-off and resized to 200 x 200 nm2 (Fig.3) with the FIB. SU- ...

2005

Oxidation induced enhanced magnetic susceptibility of Co islands on Pt(111)

Harald Brune, Stefano Rusponi, Nicolas Weiss

We have studied the evolution of the magnetic properties of monolayer-high cobalt islands on a Pt(111) surface as function of their exposure to oxygen. We observe a sequential quenching of magnetic anisotropy and magnetic moment. For minute exposures to ox ...

2004

Propriétés magnétiques de nanostructures de cobalt adsorbées

Nicolas Weiss

This thesis reports results on magnetic properties of supported cobalt nanostructures. The nanostructures were grown on single crystal metal surface by Molecular Beam Epitaxy in an Ultra High Vacuum chamber. Our experimental setup is based on two in situ m ...

EPFL2004

Supported Fe nanoclusters: Evolution of magnetic properties with cluster size

Alfredo Pasquarello, Zeljko Sljivancanin

Using a density functional approach, we study structural and magnetic properties of small Fe-n clusters (nless than or equal to8) deposited on a MgO(100) substrate. Upon deposition, the clusters closely preserve their gas-phase structure. The magnetic mome ...

2003

Magnetic reconstructions at the surface of the B2FeV alloy

Farid Amalou

We present an ab initio study of the magnetic surface reconstructions of the B2 FeV alloy using a self-consistent tight-binding linearized muffin tin orbital method developed in the atomic spheres approximation. For (001) and (111), the surface reconstruct ...

2001

Electronic and magnetic properties of ruthenocuprates

Giorgio Margaritondo, Sylvain Roy, Luca Perfetti

We report on X-ray photoemission of core levels, valence band studies using angle-integrated photoemission, and magnetization measurements of ruthenocuprate and SrRuO3 polycrystalline samples. The data indicate that the RuO2 planes are the source of the en ...

2001

Diamagnetic currents

Nicolas Macris

Abstract We study the diamagnetic surface currents of particles in thermal equilibrium submitted to a constant magnetic field. The current density of independent electrons with Boltzmann (respectively Fermi) statistics has a gaussian (respectively exponent ...

1988