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Magnetic and conductive dead layer at the La0.67Ca0.33MnO3–SrTiO3:Nb interface

Appl. Phys. Lett. 95, 182509 (2009); doi:10.1063/1.3262951

Published 6 November 2009

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S. Liang, J. R. Sun, J. Wang, and B. G. Shen
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
Interfacial properties of the La0.67Ca0.33MnO3 films grown on SrTiO3 and SrTiO3:Nb, respectively, have been experimentally studied. An interface layer, ~13 or ~4.4  nm for the films on SrTiO3 or SrTiO3:Nb, with degenerated magnetic/conductive properties is found in the film. The most remarkable result is the significantly different layer width on different substrates. The built-in electric field yielded by charge exchange may be responsible for the layer shrinkage in La0.67Ca0.33MnO3/SrTiO3:Nb. A depression of this layer by magnetic field is also observed and ascribed to field-induced enhancement of the double exchange between Mn ions. ©2009 American Institute of Physics
History: Received 18 August 2009; accepted 20 October 2009; published 6 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/182509/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.70.Cn
    Magnetic properties of interfaces
  • 73.61.Ng
    Electrical properties of insulators (thin films)
  • 68.55.aj
    Insulator thin film nucleation and growth
  • YEAR: 2010

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
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REFERENCES (9)
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