Mutually synchronized bottom-up multi-nanocontact spin-torque oscillators
Artikel i vetenskaplig tidskrift, 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.

Författare

Sohrab R. Sani

Kungliga Tekniska Högskolan (KTH)

NanOsc AB

Johan Persson

NanOsc AB

Seyed Majid Mohseni

NanOsc AB

Kungliga Tekniska Högskolan (KTH)

Yevgen Pogoryelov

Göteborgs universitet

Pranaba Muduli Kishor

Göteborgs universitet

Anders Eklund

Kungliga Tekniska Högskolan (KTH)

G. Malm

Kungliga Tekniska Högskolan (KTH)

Mikael Käll

Chalmers, Teknisk fysik, Bionanofotonik

Alexander Dmitriev

Chalmers, Teknisk fysik, Bionanofotonik

Johan Åkerman

Göteborgs universitet

Nature Communications

2041-1723 (ISSN)

Vol. 4

Styrkeområden

Nanovetenskap och nanoteknik

Materialvetenskap

Ämneskategorier

Fysik

Nanoteknik

Den kondenserade materiens fysik

DOI

10.1038/ncomms3731