To the top

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

Tell a friend about this page
Print version

Time-resolved imaging of … - University of Gothenburg, Sweden Till startsida
To content Read more about how we use cookies on

Time-resolved imaging of magnetization dynamics in double nanocontact spin torque vortex oscillator devices

Journal article
Authors E. Burgos-Parra
P. S. Keatley
S. Sani
Phillip Durrenfeld
Johan Åkerman
R. J. Hicken
Published in Physical Review B
Volume 100
Issue 13
ISSN 2469-9950
Publication year 2019
Published at Department of Physics (GU)
Language en
Subject categories Physical Sciences


Double nanocontact (NC) spin transfer vortex oscillator devices, in which NCs of 100-nm diameter have center-to-center separation ranging from 200 to 1100 nm, have been studied by means of electrical measurements and time-resolved scanning Kerr microscopy (TRSKM). The NCs were positioned close to the edge of the top electrical contact so that the magnetization dynamics of the adjacent region could be probed optically. The electrical measurements showed different ranges of frequency operation for devices with different NC separations. For 900-nm NC separation, TRSKM showed magnetic contrast consistent with the formation of a magnetic vortex at each NC, while for 200-nm NC separation a lack of magnetic contrast near the NC region suggests that the magnetization dynamics occur closer to the NC and underneath the top contact. TRSKM also reveals the presence of additional localized dynamical features far from the NCs, which are not seen by electrical measurements; has not been reported previously for double NCs with different separations; and provides insight into how the dynamic state of the phase-locked oscillators is established and stabilized.

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

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?