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High‐ TC interfacial ferromagnetism in SrMnO 3 LaMnO 3 superlattices

  • Keunecke, Marius Erstes Physikalisches Institut, Georg‐August‐Universität‐Göttingen Friedrich‐Hund‐Platz 1 37077 Göttingen Germany
  • Lyzwa, Fryderyk Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg Chemin du Musée 3 CH‐1700 Fribourg Switzerland
  • Schwarzbach, Danny Erstes Physikalisches Institut, Georg‐August‐Universität‐Göttingen Friedrich‐Hund‐Platz 1 37077 Göttingen Germany - Institut für Materialphysik, Georg‐August‐Universität‐Göttingen Friedrich‐Hund‐Platz 1 37077 Göttingen Germany
  • Roddatis, Vladimir Institut für Materialphysik, Georg‐August‐Universität‐Göttingen Friedrich‐Hund‐Platz 1 37077 Göttingen Germany
  • Gauquelin, Nicolas EMATUniversity of Antwerp Groenenborgerlaan 171 2020 Antwerp Belgium
  • Müller‐Caspary, Knut EMATUniversity of Antwerp Groenenborgerlaan 171 2020 Antwerp Belgium
  • Verbeeck, Johann EMATUniversity of Antwerp Groenenborgerlaan 171 2020 Antwerp Belgium
  • Callori, Sara J. Australian Centre for Neutron Scattering, ANSTO New Illawarra Road Lucas Heights NSW 2234 Australia - Department of Physics, California State University San Bernardino CA 92407 USA
  • Klose, Frank Australian Centre for Neutron Scattering, ANSTO New Illawarra Road Lucas Heights NSW 2234 Australia - Guangdong Technion‐Israel Institute of Technology 241 Da Xue Road Shantou 515063 P. R. China
  • Jungbauer, Markus Erstes Physikalisches Institut, Georg‐August‐Universität‐Göttingen Friedrich‐Hund‐Platz 1 37077 Göttingen Germany
  • Moshnyaga, Vasily Erstes Physikalisches Institut, Georg‐August‐Universität‐Göttingen Friedrich‐Hund‐Platz 1 37077 Göttingen Germany
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    05.02.2020
Published in:
  • Advanced Functional Materials. - 2020, vol. 30, no. 18, p. 1808270
English 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.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/308752
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