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Electrical properties of La-doped strontium titanate thin films

Appl. Phys. Lett. 80, 2928 (2002); doi:10.1063/1.1470694

Issue Date: 22 April 2002

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David Olaya, Feng Pan, Charles T. Rogers, and John C. Price
Department of Physics, Campus Box 390, University of Colorado, Boulder, Colorado 80309-0390
We report on the properties of lanthanum-doped SrTiO3 thin films grown by off-axis laser ablation on LaAlO3 and SrTiO3 substrates in oxygen partial pressures ranging from 10–8 Torr to 55 mTorr. The La/Sr doping ratio of the ablation target was 1%. The resulting films have carrier densities measured in the range of 4.7–17.5×1019 cm–3 independent of temperature from room temperature to 4 K and low-temperature mobilities as high as 130 cm2/V s. These films are much more tolerant to the presence of oxygen during growth than were similar Nb-doped films reported previously. ©2002 American Institute of Physics.
History: Received 10 October 2001; accepted 26 February 2002
Permalink: http://link.aip.org/link/?APPLAB/80/2928/1
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KEYWORDS and PACS

Keywords
PACS
  • 73.50.Dn
    Electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures Electronic transport phenomena in thin films Low-field transport and mobility; piezoresistance
  • 73.50.Jt
    Electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures Electronic transport phenomena in thin films Galvanomagnetic and other magnetotransport effects (including thermomagnetic effects)
  • 81.15.Fg
    Materials science Methods of deposition of films and coatings; film growth and epitaxy Laser deposition
  • 74.50.+r
    Superconductivity Proximity effects, weak links, tunneling phenomena, and Josephson effects
  • 72.20.My
    Electronic transport in condensed matter Conductivity phenomena in semiconductors and insulators Galvanomagnetic and other magnetotransport effects
  • 68.55.Jk
    Surfaces and interfaces; thin films and low-dimensional systems (structure and nonelectronic properties) Thin film structure and morphology Structure and morphology; thickness; crystalline orientation and texture
  • 72.20.Fr
    Electronic transport in condensed matter Conductivity phenomena in semiconductors and insulators Low-field transport and mobility; piezoresistance
  • YEAR: 2002

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (8)
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