# Redox-controlled epitaxy and magnetism of oxide heterointerfaces: EuO/SrTiO$_3$

## TL;DR

This paper introduces a redox-controlled method to synthesize EuO thin films with tunable properties, demonstrating its universality across different substrates and revealing new insights into oxide heterointerface magnetism.

## Contribution

It presents a novel redox-controlled epitaxial growth technique for EuO films, enabling property tuning and broad substrate applicability.

## Key findings

- Successful synthesis of EuO films via redox control
- Tunable electronic, magnetic, and structural properties
- Universality of the method across various substrates

## Abstract

We demonstrate a novel route to prepare thin films of the ferromagnetic insulator Europium monoxide. Key is a redox-controlled interface reaction between metallic Eu and the substrate SrTiO$_3$ as the supplier of oxygen. The process allows tuning the electronic, magnetic and structural properties of the EuO films. Furthermore, we apply this technique to various oxidic substrates and demonstrate the universality and limits of a redox-controlled EuO film synthesis.