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Enhancement of spin-torque diode sensitivity in a magnetic tunnel junction by parametric synchronization

Journal article
Authors Dhananjay Tiwari
Naveen Sisodia
Raghav Sharma
Philipp Dürrenfeld
Johan Åkerman
Pranaba Muduli Kishor
Published in Applied Physics Letters
Volume 108
Pages 082402
ISSN 0003-6951
Publication year 2016
Published at Department of Physics (GU)
Pages 082402
Language en
Subject categories Magnetism, Other electrical engineering, electronics and photonics, Nano Technology


We demonstrate enhanced radio frequency (RF) detection sensitivity in a magnetic tunnel junction based spin torqueoscillator (STO) using parametric synchronization. The parametric synchronization is observed above the auto-oscillation threshold of the STO and enhances the RF sensitivity at 2f0, where f0 is the auto-oscillation frequency. The maximum RF sensitivity for parametric synchronization at 2f0≃9 GHz2f0≃9 GHz is 16 mV/mW, while the maximum RF sensitivity at f0≃4.5 GHzf0≃4.5 GHz without parametric synchronization is 12 mV/mW. Macrospin simulations corroborate the experimental results.

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