# Thickness dependence and dimensionality effects of charge and magnetic orderings in La1/3Sr2/3FeO3 thin films

## TL;DR

This study examines how the thickness of La1/3Sr2/3FeO3 thin films influences their charge and magnetic orderings, revealing that magnetic correlation lengths are proportional to film thickness and vanish below a critical thickness of 5-15 nm.

## Contribution

It provides the first systematic analysis of thickness-dependent charge and magnetic orderings in La1/3Sr2/3FeO3 thin films using advanced x-ray scattering techniques.

## Key findings

- Magnetic correlation lengths scale with film thickness.
- Magnetic order disappears below 5-15 nm thickness.
- Orderings are present even at the surface, unaffected by surface defects.

## Abstract

We investigate the thickness effects on charge and magnetic orderings in Fe perovskite oxide La1/3Sr2/3FeO3/SrTiO3 thin films by hard x-ray and resonant soft x-ray scattering (RSXS) with changing thin film thickness systematically. We found that the correlation lengths of the magnetic ordering along the in-plane and out-of-plane directions are comparable and proportional to the thickness, and shows stronger thickness dependence than those of charge orderg. %the thickness dependence of correlation length of charge ordering is smaller than that of magnetic orderings. The magnetic ordered states disappear when the correlation length of magnetic ordering decreases to that of charge ordering through the intrinsic thickness effects. Surface sensitive grazing-incident RSXS revealed that the orderings exist even in the surface region, which indicates that the observed orderings is not affected by surface effect like oxygen vacancies. Critical thickness is in 5-15 nm, which corresponds to 4-11 antiferromagnetic ordering period. This critical value seems to be common to other ferromagnetic oxide thin films.