To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Microwave Signal Generati… - University of Gothenburg, Sweden Till startsida
Sitemap
To content Read more about how we use cookies on gu.se

Microwave Signal Generation in Single-Layer Nano-Contact Spin Torque Oscillators

Journal article
Authors S. R. Sani
Philipp Dürrenfeld
S.M. Mohseni
Sunjae Chung
Johan Åkerman
Published in Ieee Transactions on Magnetics
Volume 49
Issue 7
Pages 4331-4334
ISSN 0018-9464
Publication year 2013
Published at Department of Physics (GU)
Pages 4331-4334
Language en
Links dx.doi.org/10.1109/tmag.2013.225093...
Keywords Single layer, spin torque oscillator, vortex, POLARIZED CURRENT, DRIVEN
Subject categories Physical Sciences

Abstract

We demonstrate spin transfer torque (STT) driven microwave signal generation, from about 250 MHz to above 3 GHz, in single perm alloy layers underneath a nano-contact with diameter of 100 nm. The threshold current for signal generation is found to be strongly hysteretic, the microwave signal shows a number of harmonics, zero-field operation is straightforward, and the microwave frequency increases quasi-linearly with drive current. All observations are consistent with STT driven motion of a vortex-antivortex pair nucleated by the Oersted field underneath the nano-contact. While the generated power is about 10 dB smaller than the best GMR based nano-contact spin torque oscillators, the linewidth of 6-100 MHz is of the same order.

Page Manager: Webmaster|Last update: 9/11/2012
Share:

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?