Current-driven microwave oscillations in current perpendicular-to-plane spin-valve nanopillars

TL;DR

This paper investigates microwave voltage emissions in spin-valve nanopillars under current and temperature variations, demonstrating clear emission with narrow spectral lines despite complex multilayer structures.

Contribution

It reveals the conditions for microwave emission in spin-valve nanopillars and characterizes their spectral properties under different currents and temperatures.

Findings

Microwave emission is achievable despite complex multilayer geometry.

Spectral lines as narrow as 3.8 MHz observed at 150 K.

Emission depends on current and temperature conditions.

Abstract

We study the current and temperature dependences of the microwave voltage emission of spin-valve nanopillars subjected to an in-plane magnetic field and a perpendicular-to-plane current. Despite the complex multilayer geometry, clear microwave emission is shown to be possible and spectral lines as narrow as 3.8 MHz (at 150 K) are observed.