Induced magneto-transport properties at palladium/yttrium iron garnet interface

TL;DR

This study investigates how a palladium layer on yttrium iron garnet induces unique magneto-transport effects, revealing interfacial local moments as the cause of high-field phenomena absent in standalone Pd.

Contribution

It demonstrates the emergence of novel magneto-transport effects at the Pd/YIG interface due to interfacial local moments, not observed in pure Pd or thick Pd on YIG.

Findings

Low-field magnetoresistance tracks YIG coercive field

High-field magnetoresistance and Hall effect are linked to interfacial moments

Distinct high-field effects are caused by interfacial local moments

Abstract

As a thin layer of palladium (Pd) is directly deposited on an yttrium iron garnet or YIG (Y3Fe5O12) magnetic insulator film, Pd develops both low- and high-field magneto-transport effects that are absent in standalone Pd or thick Pd on YIG. While the low-field magnetoresistance peak of Pd tracks the coercive field of the YIG film, the much larger high-field magnetoresistance and the Hall effect do not show any obvious relationship with the bulk YIG magnetization. The distinct high-field magneto-transport effects in Pd are shown to be caused by interfacial local moments in Pd.