Regensburg 2007 – scientific programme
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MA: Fachverband Magnetismus
MA 16: Invited Talks Ebels / Manosa
MA 16.1: Invited Talk
Wednesday, March 28, 2007, 14:00–14:30, H10
Out of plane steady-state precession for the 'perpendicular polarizer-planar free layer' spin torque oscillator — •Ursula Ebels1, Dimitri Houssameddine1, Bertrand Delaet2, Bernard Rodmacq1, Ioana Firastrau2,3, Fabienne Ponthenier2, Magali Brunet2, Christophe Thirion1, Jean-Philipe Michel1, Liliana Prejbeanu-Buda1, Marie-Claire Cyrille2, and Bernard Dieny2 — 1SPINTEC URA 2512, C.E.A/DRFMC - C.N.R.S, CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble, France — 2LIMN/DIHS/LETI CEA-Grenoble, 17 rue des Martyrs, 38054 Grenoble, France — 3TRANSILVANIA University of Brasov, 29 Bulevardul Eroilor, R-500036 Brasov, Romania
The possibility to excite large angle steady-state precessions of the free layer magnetisation in spin valves or magnetic tunnel junctions, using a spin polarised DC current, has recently attracted much attention. These steady state precessions, in combination with the magneto-resistance of such devices, open new applications of spin electronics materials such as wide band tuneable radio frequency (RF) oscillators. While previous spin transfer oscillators (STO) were based on in-plane magnetized structures, here we present the realization of an STO that contains a perpendicular polarizer combined with an in-plane magnetized free layer. The static and dynamic transport experiments validate the theoretical predictions for this configuration which will be of interest for the design of STOs having improved output signals and being operated in zero fields and at currents close to the threshold current Ic.