Room-temperature magnetoresistance switching of Py thin films induced by Fe-nanoparticles grown by STM-assisted CVD

TL;DR

This study demonstrates room-temperature magnetoresistance switching in Py thin films caused by Fe-nanoparticles grown via STM-assisted CVD, revealing magnetic coupling effects and magnetization switching at the nanoscale.

Contribution

It introduces a novel method of inducing magnetoresistance switching at room temperature using Fe-nanoparticles on Py films, combining STM-assisted CVD with magnetoresistance measurements.

Findings

Negative jumps in Py magnetoresistance due to nanoparticle coupling

Magnetization switching of individual particles affects Py MR

Homogeneous particle magnetization yields highest resistance

Abstract

Arrays of Fe-nanoparticles grown by STM-assited CVD have been placed on top of a narrow stripe of Py. The magnetic coupling between the nanoparticles and the underlying Py film results in distinct negative jumps of the Py magnetoresistance. The switching of the magnetization orientation of individual particles is clearly reflected in the Py magnetoresistance as a consequence of AMR and DWMR, with a homogeneous particle magnetization orientation yielding the highest resistances.