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19 papers · 2 filters
Manifestation of geometric frustration on magnetic and thermodynamic properties of pyrochlores (X=Ti, Zr)
Surjeet Singh, Surajit Saha, S. K. Dhar +3
We present here magnetization, specific heat and Raman studies on single-crystalline specimens of the first pyrochlore member of the rare-earth titanate series. Its a…
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…
Electron energy loss spectroscopy determination of Ti oxidation state at the (001) LaAlO3/SrTiO3 interface as a function of LaAlO3 growth conditions
Jean-Luc Maurice, Gervasi Herranz, Christian Colliex +10
At the (001) interface between the two band-insulators LaAlO3 and SrTiO3, a high-mobility electron gas may appear, which has been the object of numerous works over the last four ye…
Lineshape distortion in a nonlinear auto-oscillator near generation threshold: Application to spin-torque nano-oscillators
Joo-Von Kim, Q. Mistral, C. Chappert +2
The lineshape in an auto-oscillator with a large nonlinear frequency shift in the presence of thermal noise is calculated. Near the generation threshold, this lineshape becomes str…
Current-driven vortex oscillations in metallic nanocontacts
Q. Mistral, M. van Kampen, G. Hrkac +6
We present experimental evidence of sub-GHz spin-transfer oscillations in metallic nano-contacts that are due to the translational motion of a magnetic vortex. The vortex is shown…
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…