Repository logo
 

Vertical Strain-Driven Antiferromagnetic to Ferromagnetic Phase Transition in EuTiO3 Nanocomposite Thin Films

Accepted version
Peer-reviewed

No Thumbnail Available

Type

Article

Change log

Authors

Choi, EM 
Ping, Lu 
Xing, Sun 
Rui, Wu 

Abstract

Abstract Three-dimensional (3D) strain induced in self-assembled vertically aligned nanocomposite (VAN) epitaxial films provides an unrivaled method to induce very large strains in thin films. Here, by growing VAN films of EuTiO3 (ETO)- Eu2O3 (EO) with different EO fractions, the vertical strain was systematically increased in ETO, up to 3.15%, and the Eu-Ti-Eu bond angle along <111> decreased by up to 1°, leading to a weakening of the antiferromagnetic interactions, and switching from antiferromagnetic to ferromagnetic behaviour. Our work has shown for the first time that Eu-Ti-Eu superexchange interactions play a key role in determining the magnetic ground state of ETO. More broadly, our work serves as an exemplar to show that multifunctionalities in strong spin-lattice coupling perovskite oxides can be uniquely tuned at the atomic scale using simple VAN structures.

Description

Keywords

Journal Title

ACS Applied Materials and Interfaces

Conference Name

Journal ISSN

1944-8244

Volume Title

Publisher

American Chemical Society

Rights

All rights reserved
Sponsorship
Engineering and Physical Sciences Research Council (EP/L011700/1)
Engineering and Physical Sciences Research Council (EP/N004272/1)
China Scholarship Council and Cambridge Commonwealth, European and International Trust.
Relationships
Is supplemented by: