Current-induced resonance in a ferromagnet - antiferromagnet junction

TL;DR

This paper investigates how a ferromagnet-antiferromagnet junction responds to high-frequency magnetic fields when driven by spin-polarized currents, revealing potential for terahertz detection.

Contribution

It demonstrates the current-dependent resonance behavior in ferromagnet-antiferromagnet junctions and proposes their use as terahertz radiation detectors.

Findings

Resonance frequency increases with current density.

Resonant absorption is proportional to current.

Zero response occurs without current.

Abstract

We calculate the response of a ferromagnet - antiferromagnet junction to a high-frequency magnetic field as a function of the spin-polarized current through the junction. Conditions are choused under which the response is zero in absence of such a current. It is shown that increasing in the current density leads to proportional increase in the resonance frequency and resonant absorption. A principal possibility is indicated of using ferromagnet - antiferromagnet junction as a terahertz radiation detector.