Mutual phase-locking in high frequency microwave nanooscillators as function of field angle

TL;DR

This study analyzes how the phase-locking behavior of high-frequency microwave nanooscillators varies with the applied magnetic field angle, revealing angle-dependent locking currents and tunability of phase-lock frequency.

Contribution

It provides a qualitative analysis of phase locking in spinvalve systems, highlighting the influence of field angle on locking current differences and frequency tunability.

Findings

Locking-current difference peaks at 30 degrees with 14 mA.

Locking-current difference decreases to 1 mA at 75 degrees.

Frequency tunability decreases linearly from 45 to 21 MHz/mA with angle.

Abstract

We perform a qualitative analysis of phase locking in a double point-contact spinvalve system by solving the Landau-Lifshitz-Gilbert-Slonzewski equation using a hybrid-finite-element method. We show that the phase-locking behaviour depends on the applied field angle. Starting from a low field angle, the locking-current difference between the current through contact A and B increases with increasing angle up to a maximum of 14 mA at 30 degree and it decreases thereafter until it reaches a minimum of 1 mA at 75 degree. The tunability of the phase-lock frequency with current decreases linearly with increasing out of plane angle from 45 to 21 MHz/mA.