Growth-sequence-dependent interface magnetism of SrIrO3–La0.7Sr0.3MnO3 bilayers

L. Bergmann; P. Düring; S. Agrestini; A. Efimenko; S.-C. Liao; Z. Hu; P. Gargiani; C.-J. Choi; H. Baik; D.-S. Park; K. Dörr; A. D. Rata

doi:10.1063/1.5143713

AIP Advances (Mar 2020)

Growth-sequence-dependent interface magnetism of SrIrO3–La0.7Sr0.3MnO3 bilayers

L. Bergmann,
P. Düring,
S. Agrestini,
A. Efimenko,
S.-C. Liao,
Z. Hu,
P. Gargiani,
C.-J. Choi,
H. Baik,
D.-S. Park,
K. Dörr,
A. D. Rata

Affiliations

L. Bergmann: Institute of Physics, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
P. Düring: Institute of Physics, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
S. Agrestini: ALBA Synchrotron Light Source, E-08290 Cerdanyola del Vallès, Barcelona, Spain
A. Efimenko: European Synchrotron Radiation Facility, Boîte Postale 220, 38043 Grenoble Cedex, France
S.-C. Liao: Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany
Z. Hu: Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Strasse 40, 01187 Dresden, Germany
P. Gargiani: ALBA Synchrotron Light Source, E-08290 Cerdanyola del Vallès, Barcelona, Spain
C.-J. Choi: Semiconductor Physics Research Center (SPRC), Chonbuk National University, 567 Baekje-daero, Jeonju, South Korea
H. Baik: Division of Analytical Research, Korea Basic Science Institute, Seoul 136-713, South Korea
D.-S. Park: Laboratory for Electroceramic Thin Films, Swiss Federal Institute of Technology–EPFL, Lausanne 1015, Switzerland
K. Dörr: Institute of Physics, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany
A. D. Rata: Institute of Physics, Martin Luther University Halle-Wittenberg, 06099 Halle, Germany

DOI: https://doi.org/10.1063/1.5143713
Journal volume & issue: Vol. 10, no. 3
pp. 035132 – 035132-8

Abstract

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Bilayers of the oxide 3d ferromagnet La0.7Sr0.3MnO3 (LSMO) and the 5d paramagnet SrIrO3 (SIO) with large spin–orbit coupling (SOC) have been investigated regarding the impact of interfacial SOC on magnetic order. For the growth sequence of LSMO on SIO, ferromagnetism is strongly altered and large out-of-plane-canted anisotropy associated with lacking magnetic saturation up to 4 T has been observed. Thin bilayer films have been grown coherently in both growth sequences on SrTiO3 (001) by pulsed laser deposition and structurally characterized by scanning transmission electron microscopy and x-ray diffraction. Measurements of magnetization and field-dependent Mn L2,3 edge x-ray magnetic circular dichroism reveal changes of the LSMO magnetic order, which are strong in LSMO on SIO and weak in LSMO underneath SIO. We attribute the impact of the growth sequence to the interfacial lattice structure, which is known to influence the interfacial magnetic coupling governed by MnO6 octahedral rotations and/or distortions.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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