Control of magnetization reversal in oriented Strontium Ferrite thin films

TL;DR

This study investigates how oxygen partial pressure during deposition influences magnetization reversal mechanisms in oriented Strontium Ferrite thin films, revealing different reversal types linked to growth conditions.

Contribution

It demonstrates the control of magnetization reversal modes in Strontium Ferrite films through oxygen partial pressure during fabrication, providing insights into magnetic behavior tuning.

Findings

Lower oxygen pressure yields Stoner-Wohlfarth reversal

Higher oxygen pressure results in Kondorsky-like reversal

Pinning and nucleation processes vary with growth conditions

Abstract

Oriented Strontium Ferrite films with the c axis orientation were deposited with varying oxygen partial pressure on Al2O3(0001) substrate using PLD technique. The angle dependent magnetic hysteresis, remanent coercivity and temperature dependent coercivity had been employed to understand the magnetization reversal of these films. It was found that the Strontium Ferrite thin film grown at lower (higher) oxygen partial pressure shows Stoner-Wohlfarth type (Kondorsky like) reversal. The relative importance of pinning and nucleation processes during magnetization reversal is used to explain the type of the magnetization reversal with different oxygen partial pressure during growth.