Mutually synchronized bottom-up multi-nanocontact spin-torque oscillators
Journal article, 2013

Spin-torque oscillators offer a unique combination of nanosize, ultrafast modulation rates and ultrawide band signal generation from 100 MHz to close to 100 GHz. However, their low output power and large phase noise still limit their applicability to fundamental studies of spin-transfer torque and magnetodynamic phenomena. A possible solution to both problems is the spin-wave-mediated mutual synchronization of multiple spin-torque oscillators through a shared excited ferromagnetic layer. To date, synchronization of high-frequency spin-torque oscillators has only been achieved for two nanocontacts. As fabrication using expensive top-down lithography processes is not readily available to many groups, attempts to synchronize a large number of nanocontacts have been all but abandoned. Here we present an alternative, simple and cost-effective bottom-up method to realize large ensembles of synchronized nanocontact spin-torque oscillators. We demonstrate mutual synchronization of three high-frequency nanocontact spin-torque oscillators and pairwise synchronization in devices with four and five nanocontacts. © 2013 Macmillan Publishers Limited. All rights reserved.

Author

Sohrab R. Sani

Royal Institute of Technology (KTH)

Nanosc AB

Johan Persson

Nanosc AB

Seyed Majid Mohseni

Nanosc AB

Royal Institute of Technology (KTH)

Yevgen Pogoryelov

University of Gothenburg

Pranaba Muduli Kishor

University of Gothenburg

Anders Eklund

Royal Institute of Technology (KTH)

G. Malm

Royal Institute of Technology (KTH)

Mikael Käll

Chalmers, Applied Physics, Bionanophotonics

Alexander Dmitriev

Chalmers, Applied Physics, Bionanophotonics

Johan Åkerman

University of Gothenburg

Nature Communications

2041-1723 (ISSN)

Vol. 4

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Materials Science

Subject Categories

Physical Sciences

Nano Technology

Condensed Matter Physics

DOI

10.1038/ncomms3731

More information

Latest update

9/6/2018 1