Reduction-Induced Magnetic Behavior in LaFeO3-δ Thin Films

Published

March 4, 2024

Author(s)

Nathan Arndt, Eitan Hershkovitz, Labdhi Shah, Kristoffer Kjaernes, Chao-Yao Yang, Purnima Balakrishnan, Mohammed Shariff, Shaun Tauro, Daniel Gopman, Brian Kirby, Alexander Grutter, Thomas Tybell, Honggyu Kim, Ryan Need

Abstract

The effect of oxygen reduction on the magnetic properties of LaFeO3−δ (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 as-received SrTiO3 (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 annealed 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.

Citation

Materials

Volume

17

Issue

5

Pub Type

Journals

Download Paper

https://doi.org/10.3390/ma17051188

Local Download

Keywords

Magneto-ionics, Magnetism, Thin film, Electrochemistry, Interfaces, Oxygen, Oxide, SrTiO3

Citation

Arndt, N. , Hershkovitz, E. , Shah, L. , Kjaernes, K. , Yang, C. , Balakrishnan, P. , Shariff, M. , Tauro, S. , Gopman, D. , Kirby, B. , Grutter, A. , Tybell, T. , Kim, H. and Need, R. (2024), Reduction-Induced Magnetic Behavior in LaFeO3-δ Thin Films, Materials, [online], https://doi.org/10.3390/ma17051188, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935706 (Accessed October 13, 2025)