Ferromagnetic order controlled by the magnetic interface of LaNiO₃/La_2/3Ca_1/3MnO₃ superlattices

Author(s)

S. Soltan, S. Macke, S. E. Ilse, T. Pennycook, Z. L. Zhang, G. Christiani, E. Benckiser, G. Schütz, E. Goering

Abstract

Interface engineering in complex oxide superlattices is a growing field, enabling manipulation of the exceptional properties of these materials, and also providing access to new phases and emergent physical phenomena. Here we demonstrate how interfacial interactions can induce a complex charge and spin structure in a bulk paramagnetic material. We investigate a superlattice (SLs) consisting of paramagnetic LaNiO3 (LNO) and highly spin-polarized ferromagnetic La2/3Ca1/3MnO3 (LCMO), grown on SrTiO3 (001) substrate. We observed emerging magnetism in LNO through an exchange bias mechanism at the interfaces in X-ray resonant magnetic reflectivity. We find non-symmetric interface induced magnetization profiles in LNO and LCMO which we relate to a periodic complex charge and spin superstructure. High resolution scanning transmission electron microscopy images reveal that the upper and lower interfaces exhibit no significant structural variations. The different long range magnetic order emerging in LNO layers demonstrates the enormous potential of interfacial reconstruction as a tool for tailored electronic properties.

Organisation(s)

Physics of Nanostructured Materials

External organisation(s)

Max Planck Institute for Intelligent Systems, Max-Planck-Institut für Festkörperforschung, University of Antwerp, Österreichische Akademie der Wissenschaften (ÖAW), Helwan University Cairo

Journal

Scientific Reports

Volume

13

No. of pages

9

ISSN

2045-2322

DOI

https://doi.org/10.1038/s41598-023-30814-6

Publication date

03-2023

Peer reviewed

Yes

Austrian Fields of Science 2012

103018 Materials physics, 103009 Solid state physics

ASJC Scopus subject areas

General

Portal url

https://ucrisportal.univie.ac.at/en/publications/c27df4f1-f8cb-48d9-bdd2-fd8d19f87567