Interface-dependent magnetotransport properties for thin Pt films on ferrimagnetic Y3Fe5O12

TL;DR

This study investigates how the interface with ferrimagnetic Y3Fe5O12 affects the magnetotransport properties of ultra-thin Pt films across a wide temperature and magnetic field range, revealing interface-dependent quantum and classical effects.

Contribution

It provides new insights into the interface-dependent magnetotransport phenomena in ultra-thin Pt films on ferrimagnetic insulators, highlighting the suppression of weak antilocalization and altered Hall effects.

Findings

Weak antilocalization is suppressed when Pt is on Y3Fe5O12.

Hall resistance shows logarithmic temperature dependence.

High-field magnetotransport is strongly influenced by the interface.

Abstract

We have studied magnetoresistance and Hall effects for 1.8-nm-thick Pt films grown on a ferrimagnetic insulator Y3Fe5O12 in a wide temperature (0.46-300 K) and magnetic-field (-15-15 T) region. In the low-temperature regime where quantum corrections to conductivity are observed, weak antilocalization behavior observed in Pt films is critically suppressed when the film is attached to Y3Fe5O12. Hall resistance in the Pt film is also affected by Y3Fe5O12, and it exhibits logarithmic temperature dependence in a broad temperature range. The magnetotransport properties in the high-field range are significantly influenced by the interface between Pt and Y3Fe5O12.