Tuning Magnetic Properties Polycrystalline of PtCo Alloys Films with Pt

TL;DR

This study explores how varying platinum content in disordered PtCo alloy thin films influences their magnetic properties, highlighting the roles of electronic hybridization and spin-orbit coupling effects.

Contribution

It provides experimental insights into the magnetic behavior of PtCo alloys, emphasizing the effects of Pt content and electronic interactions on magnetization.

Findings

Magnetic properties depend on Pt content in the alloy.

Hybridization between Co 3d and Pt 5d levels influences magnetization.

High spin-orbit coupling of Pt enhances orbital magnetic moments.

Abstract

We experimentally investigated disordered PtxCo1-x (here x: 0.4, 0.5 and 0.6) alloy thin films magnetic properties which depended on Pt content. The magnetic properties of PtCo films were described with two effects, one of them is the hybridization between Co 3d and Pt 5d energy levels and it causes Pt magnetic polarization. The second one is the high spin orbit coupling constant of Pt which increases the ratio of magnetic orbital moment to spin moment. We investigated magnetic properties considering these effects by vibrating sample magnetometer (VSM) and ferromagnetic resonance (FMR) techniques.