# Current noise geometrically generated by a driven magnet

## TL;DR

This paper investigates a novel non-equilibrium noise phenomenon in a nano-scale ferromagnet driven by magnetization precession, offering a new method to detect and analyze ferromagnetic resonance through geometrically generated shot noise.

## Contribution

It introduces a new non-equilibrium noise effect caused by driven magnetization in a nano-scale ferromagnet, linking it to ferromagnetic resonance detection.

## Key findings

- Shot noise arises without a d.c. current due to magnetization precession.
- The noise is related to a non-equilibrium distribution in the ferromagnet.
- The protocol enables new detection and characterization of ferromagnetic resonance.

## Abstract

We consider a non-equilibrium cross-response phenomenon, whereby a driven magnetization gives rise to electric shot noise (but no d.c. current). This effect is realized on a nano-scale, with a small metallic ferromagnet which is tunnel-coupled to two normal metal leads. The driving gives rise to a precessing magnetization. The geometrically generated noise is related to a non-equilibrium distribution in the ferromagnet. Our protocol provides a new channel for detecting and characterizing ferromagnetic resonance.