Reduction-Induced Magnetic Behavior in LaFeO Thin Films

Overview

Journal Materials (Basel)

Publisher MDPI

Date 2024 Mar 13

PMID 38473659

Authors

Nathan D Arndt

Eitan Hershkovitz

Labdhi Shah

Kristoffer Kjaernes

Chao-Yao Yang

Purnima P Balakrishnan

Mohammed S Shariff

Shaun Tauro

Daniel B Gopman

Brian J Kirby

Alexander J Grutter

Thomas Tybell

Honggyu Kim

Ryan F Need

Affiliations

Soon will be listed here.

Abstract

The effect of oxygen reduction on the magnetic properties of LaFeO (LFO) thin films was studied to better understand the viability of LFO as a candidate for magnetoionic memory. Differences in the amount of oxygen lost by LFO and its magnetic behavior were observed in nominally identical LFO films grown on substrates prepared using different common methods. In an LFO film grown on SrTiO (STO) substrate, the original perovskite film structure was preserved following reduction, and remnant magnetization was only seen at low temperatures. In a LFO film grown on STO, the LFO lost significantly more oxygen and the microstructure decomposed into La- and Fe-rich regions with remnant magnetization that persisted up to room temperature. These results demonstrate an ability to access multiple, distinct magnetic states via oxygen reduction in the same starting material and suggest LFO may be a suitable materials platform for nonvolatile multistate memory.

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