Publication

Effects of magnetism in superconducting hybrid structures

Publications associées (146)

Suppression of Zeeman Splitting of the Energy Levels of Exciton-Polariton Condensates in Semiconductor Microcavities in an External Magnetic Field

A key property of equilibrium exciton-polariton condensates in semiconductor microcavities is the suppression of the Zeeman splitting under a magnetic field. By studying magnetophotoluminescence spectra from a GaAs microcavity, we show experimentally that ...

2011

Current-induced domain wall motion in nanoscale ferromagnetic elements

We review the details of domain wall (DW) propagation due to spin-polarized currents that could potentially be used in magnetic data storage devices based on domains and DWs. We discuss briefly the basics of the underlying spin torque effect and show how t ...

2011

Extraction of the spin torque non-adiabaticity from thermally activated domain wall hopping

We investigate the non-adiabaticity of current-induced domain wall motion by time resolved analysis of thermally activated domain wall motion between two metastable states within a Co/Pt multilayer wire with a strong uniaxial perpendicular anisotropy. By m ...

2011

Formation of magnetic domains and domain walls in epitaxial Fe3O4(100) elements (invited)

Magnetic domains and domain walls in epitaxial Fe3O4(100) elements (rings and wires) are imaged using magnetic force microscopy and photoemission electron microscopy. We show that the interplay between the four-fold magnetocrystalline anisotropy and the sh ...

2011

Tunneling magnetoresistance with sign inversion in junctions based on iron oxide nanocrystal superlattices

Raffaella Buonsanti

Magnetic tunnel junctions sandwiching a superlattice thin film of Fe oxide nanocrystals (NCs) were investigated. The transport was found to be controlled by Coulomb blockade and single-electron tunneling, already at room temp. A good correlation was identi ...

2011

Superconducting periodic nanostructures in a magnetic field

Paul Erdös

Superconducting nanostructures in the form of square and hexagonal nets of conductors in an external magnetic field are theoretically investigated. The superconducting transition temperatures as functions of the field as well as the intricate patterns of t ...

2010

Observations of Pauli paramagnetic effects on the flux line lattice in CeCoIn5

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From small-angle neutron scattering studies of the flux line lattice (FLL) in CeCoIn5, with magnetic field applied parallel to the crystal c-axis, we obtain the field and temperature dependence of the FLL form factor (FF), which is a measure of the spatial ...

2010

Superconducting phase in the layered dichalcogenide 1T-TaS_{2} upon inhibition of the metal-insulator transition

László Forró, Henrik Moodysson Rønnow, Marco Grioni, Balazs Sipos, Helmuth Berger, Julian Piatek, Ping-Hui Lin, Peng Xu

When a Mott metal-insulator transition is inhibited by a small amount of disorder in the layered dichalcogenide 1T-TaS2, an inhomogeneous superconducting state arises below T=2.1 K and coexists with a nearly commensurate charge-density wave. By angle-resol ...

2010

Search for nuclear magnetic resonance evidence of spin accumulation

Aurore Rudolf

Developments towards an understanding of the nature of conductance at the interface between two different metallic layers – ferromagnetic and non magnetic – as well as the discovery of giant magnetoresistance have stirred attention from both the scientific ...

EPFL2009

Magnetic-Fluorescent Colloidal Nanobeads: Preparation and Exploitation in Cell Separation Experiments

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Nanostructures displaying fluorescence and magnetic properties at the same time are potentially useful for achieving simultaneous bio-sepn. and bio-sensing (e.g., magnetic sepn. coupled with multiplexing optical detection of different tumor cell population ...

2009

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