TY  - JOUR
AU  - Keunecke, Marius
AU  - Lyzwa, Fryderyk
AU  - Schwarzbach, Danny
AU  - Roddatis, Vladimir
AU  - Gauquelin, Nicolas
AU  - Müller‐Caspary, Knut
AU  - Verbeeck, Johann
AU  - Callori, Sara J.
AU  - Klose, Frank
AU  - Jungbauer, Markus
AU  - Moshnyaga, Vasily
TI  - High‐ T C Interfacial Ferromagnetism in SrMnO 3 /LaMnO 3 Superlattices
JO  - Advanced functional materials
VL  - 30
IS  - 18
SN  - 1616-3028
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2020-02742
SP  - 1808270
PY  - 2020
AB  - Heterostructures of strongly correlated oxides demonstrate various intriguing and potentially useful interfacial phenomena. LaMnO3/SrMnO3 superlattices are presented showcasing a new high‐temperature ferromagnetic phase with Curie temperature, T C ≈360 K, caused by electron transfer from the surface of the LaMnO3 donor layer into the neighboring SrMnO3 acceptor layer. As a result, the SrMnO3 (top)/LaMnO3 (bottom) interface shows an enhancement of the magnetization as depth‐profiled by polarized neutron reflectometry. The length scale of charge transfer, λTF ≈2 unit cells, is obtained from in situ growth monitoring by optical ellipsometry, supported by optical simulations, and further confirmed by high resolution electron microscopy and spectroscopy. A model of the inhomogeneous distribution of electron density in LaMnO3/SrMnO3 layers along the growth direction is concluded to account for a complex interplay between ferromagnetic and antiferromagnetic layers in superlattices.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000535358900008
DO  - DOI:10.1002/adfm.201808270
UR  - https://juser.fz-juelich.de/record/878279
ER  -