The emergence of magnetic ordering at complex oxide interfaces tuned by defects
Artikel i vetenskaplig tidskrift, 2020

Complex oxides show extreme sensitivity to structural distortions and defects, and the intricate balance of competing interactions which emerge at atomically defined interfaces may give rise to unexpected physics. In the interfaces of non-magnetic complex oxides, one of the most intriguing properties is the emergence of magnetism which is sensitive to chemical defects. Particularly, it is unclear which defects are responsible for the emergent magnetic interfaces. Here, we show direct and clear experimental evidence, supported by theoretical explanation, that the B-site cation stoichiometry is crucial for the creation and control of magnetism at the interface between non-magnetic ABO3-perovskite oxides, LaAlO3 and SrTiO3. We find that consecutive defect formation, driven by atomic charge compensation, establishes the formation of robust perpendicular magnetic moments at the interface. Our observations propose a route to tune these emerging magnetoelectric structures, which are strongly coupled at the polar-nonpolar complex oxide interfaces.

Författare

D. S. Park

Ecole Polytechnique Federale De Lausanne

A. D. Rata

Martin-Luther-Universität Halle-Wittenberg

I. V. Maznichenko

Martin-Luther-Universität Halle-Wittenberg

S. Ostanin

Martin-Luther-Universität Halle-Wittenberg

Y. L. Gan

Danmarks Tekniske Universitet (DTU)

S. Agrestini

Diamond Light Source

El Sincrotrón ALBA

G. J. Rees

University of Oxford

M. Walker

The University of Warwick

J. Li

Ecole Polytechnique Federale De Lausanne

J. Herrero-Martin

El Sincrotrón ALBA

Gyanendra Singh

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Z. Luo

The University of Warwick

A. Bhatnagar

Martin-Luther-Universität Halle-Wittenberg

Zentrum für Innovationskompetenz SiLi-nano

Y. Z. Chen

Danmarks Tekniske Universitet (DTU)

V. Tileli

Ecole Polytechnique Federale De Lausanne

P. Muralt

Ecole Polytechnique Federale De Lausanne

Alexei Kalaboukhov

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

I. Mertig

Martin-Luther-Universität Halle-Wittenberg

K. Dorr

Martin-Luther-Universität Halle-Wittenberg

A. Ernst

Max-Planck-Gesellschaft

Johannes Kepler Universität Linz (JKU)

N. Pryds

Danmarks Tekniske Universitet (DTU)

Nature Communications

2041-1723 (ISSN)

Vol. 11 1 3650

Ämneskategorier

Oorganisk kemi

Fysikalisk kemi

Den kondenserade materiens fysik

DOI

10.1038/s41467-020-17377-0

PubMed

32686663

Mer information

Senast uppdaterat

2020-08-29