Dresden 2017 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 64: Poster 1
MA 64.69: Poster
Freitag, 24. März 2017, 09:30–13:00, P2-EG
Stabilization of phase noise in vortex spin torque nano oscillators by a Phase Locked Loop — Martin Kreissig2, •Steffen Wittrock1, Romain Lebrun1, Samh Menshawy1, Karla Merazzo-Jaimes3, Marie-Claire Cyrille4, Ricardo Ferreira5, Frank Ellinger2, Paolo Bortolotti1, Ursula Ebels3, and Vincent Cros1 — 1Unité Mixte de Physique CNRS/Thales, Univ. Paris-Sud, Univ. Paris-Saclay, 91767 Palaiseau, France — 2Chair for Circuit Design and Network Theory, Technische Univ. Dresden, 01062 Dresden, Germany — 3Univ. Grenoble Alpes, CEA, INAC-SPINTEC, CNRS, SPINTEC, 38000 Grenoble, France — 4Univ. Grenoble Alpes, CEA-LETI MINATEC-CAMPUS, 38000 Grenoble, France — 5International Iberian Nanotechnology Laboratory (INL), 471531 Braga, Portugal
After a decade of research, large expectations have been anticipated on how the rich physics of spin transfer induced magnetization dynamics could give birth to a new generation of multi-functional microwave spintronic devices. One major issue of spin-torque nano-oscillators (STNOs) is their relatively poor spectral coherence given by their highly nonlinear behavior. Within this work, we tackle this concern and could efficiently control the phase noise of vortex based STNOs by implementation of an integrated Phase Locked Loop (PLL) circuit. Focussing on vortex based STOs presenting higher spectral coherences than other kinds of STOs, a reduction of phase noise by more than 50dB at 10kHz from the carrier frequency is achieved under various field and current conditions.