A high-speed single sideband generator using a magnetic tunnel junction spin torque nano-oscillator
Artikel i vetenskaplig tidskrift, 2017

An important property of spin-torque nano-oscillators (STNOs) is their ability to produce a frequency modulated (FM) signal, which is very critical for communication applications. We here demonstrate a novel single sideband (SSB) modulation phenomenon using a magnetic tunnel junction (MTJ)-based STNO, which saves transmission bandwidth and in principle should minimize attenuation for wireless communication. Experimentally, lower single sidebands (LSSBs) have been successfully demonstrated over a wide range of modulation frequency, f(m) = 150 MHz-1 GHz. The observed LSSBs are determined by the intrinsic properties of the device, which can be modeled well by a nonlinear frequency and amplitude modulation formulation and reproduced in macrospin simulations. Moreover, our macrospin simulation results show that the range of modulation current and modulation frequency for generating SSBs can be controlled by the field-like torque and biasing conditions.

Författare

R. Sharma

Indian Institute of Technology

N. Sisodia

Indian Institute of Technology

Ezio Iacocca

Chalmers, Fysik, Teoretisk fysik

Ahmad Awad

Göteborgs universitet

Johan Åkerman

Kungliga Tekniska Högskolan (KTH)

Göteborgs universitet

Pranaba Muduli Kishor

Indian Institute of Technology

Scientific Reports

2045-2322 (ISSN)

Vol. 7 13422

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1038/s41598-017-13551-5