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14 papers · 1 filter
Microwave excitations associated with a wavy angular dependence of the spin transfer torque : model and experiments
O. Boulle, V. Cros, J. Grollier +6
The spin transfer torque (STT) can lead to steady precession of magnetization without any external applied field in magnetic spin valve where the magnetic layer have very different…
Mechanisms of exchange bias with multiferroic BiFeO3 epitaxial thin films
H. Bea, M. Bibes, F. Ott +7
We have combined neutron scattering and piezoresponse force microscopy to study the relation between the exchange bias observed in CoFeB/BiFeO3 heterostructures and the multiferroi…
Mapping the Spatial Distribution of Charge Carriers in LaAlO3/SrTiO3 Heterostructures
M. Basletic, J. -L. Maurice, C. Carretero +7
At the interface between complex insulating oxides, novel phases with interesting properties may occur, such as the metallic state reported in the LaAlO3/SrTiO3 system. While this…
Improving HTc Josephson Junctions (HTc JJ) by annealing: the role of vacancy-interstitial annihilation
M. Sirena, S. Matzen, N. Bergeal +4
We have studied the annealing effect in transport properties of High temperature Josephson Junctions (HTc JJ) made by ion irradiation. Low temperature annealing (80 degrees Celsius…
Fractal dimension and size scaling of domains in thin films of multiferroic BiFeO3
G. Catalan, H. Bea, S. Fusil +4
We have analyzed the morphology of ferroelectric domains in very thin films of multiferroic BiFeO3. Unlike the more common stripe domains observed in thicker films BiFeO3 or in oth…
Room temperature spin filtering in epitaxial cobalt-ferrite tunnel barriers
A. V. Ramos, M. -J. Guittet, J. -B. Moussy +4
We report direct experimental evidence of room temperature spin filtering in magnetic tunnel junctions (MTJs) containing CoFe2O4 tunnel barriers via tunneling magnetoresistance (TM…