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Title: Thickness-dependent magnetic and electrical transport properties of epitaxial La 0.7Sr 0.3CoO 3 films

Abstract

The thickness-dependent magnetic and electrical transport properties of nearly strain-free La 0.7Sr 0.3CoO 3 (LSCO) films grown on (001)-oriented (LaAlO 3 ) 0.3 (Sr 2AlTaO 6) 0.7 substrates were systematically studied. A crossover from ferromagnetic/metallic to non-magnetic/insulating behavior occurs at a critical thickness (~8 nm) that is significantly smaller than LSCO films under larger strains in reported literature. X-ray absorption measurements revealed that the difference of functional properties at reduced film thicknesses was accompanied by changes in the valence state of Co ions at the film/substrate interface.

Authors:
 [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [2]; ORCiD logo [1]
  1. Univ. of California, Davis, CA (United States)
  2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1361811
Alternate Identifier(s):
OSTI ID: 1379789; OSTI ID: 1421016
Grant/Contract Number:
AC02-05CH11231
Resource Type:
Journal Article: Published Article
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 7; Journal Issue: 4; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Li, Binzhi, Chopdekar, Rajesh V., Kane, Alexander M., Hoke, Kyle, N’Diaye, Alpha T., Arenholz, Elke, and Takamura, Yayoi. Thickness-dependent magnetic and electrical transport properties of epitaxial La0.7Sr0.3CoO3 films. United States: N. p., 2017. Web. doi:10.1063/1.4979921.
Li, Binzhi, Chopdekar, Rajesh V., Kane, Alexander M., Hoke, Kyle, N’Diaye, Alpha T., Arenholz, Elke, & Takamura, Yayoi. Thickness-dependent magnetic and electrical transport properties of epitaxial La0.7Sr0.3CoO3 films. United States. doi:10.1063/1.4979921.
Li, Binzhi, Chopdekar, Rajesh V., Kane, Alexander M., Hoke, Kyle, N’Diaye, Alpha T., Arenholz, Elke, and Takamura, Yayoi. Tue . "Thickness-dependent magnetic and electrical transport properties of epitaxial La0.7Sr0.3CoO3 films". United States. doi:10.1063/1.4979921.
@article{osti_1361811,
title = {Thickness-dependent magnetic and electrical transport properties of epitaxial La0.7Sr0.3CoO3 films},
author = {Li, Binzhi and Chopdekar, Rajesh V. and Kane, Alexander M. and Hoke, Kyle and N’Diaye, Alpha T. and Arenholz, Elke and Takamura, Yayoi},
abstractNote = {The thickness-dependent magnetic and electrical transport properties of nearly strain-free La0.7Sr0.3CoO3 (LSCO) films grown on (001)-oriented (LaAlO3 ) 0.3 (Sr2AlTaO6)0.7 substrates were systematically studied. A crossover from ferromagnetic/metallic to non-magnetic/insulating behavior occurs at a critical thickness (~8 nm) that is significantly smaller than LSCO films under larger strains in reported literature. X-ray absorption measurements revealed that the difference of functional properties at reduced film thicknesses was accompanied by changes in the valence state of Co ions at the film/substrate interface.},
doi = {10.1063/1.4979921},
journal = {AIP Advances},
number = 4,
volume = 7,
place = {United States},
year = {Tue Apr 04 00:00:00 EDT 2017},
month = {Tue Apr 04 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4979921

Citation Metrics:
Cited by: 1work
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  • The thickness-dependent magnetic and electrical transport properties of nearly strain-free La 0.7Sr 0.3CoO 3 (LSCO) films grown on (001)-oriented (LaAlO 3 ) 0.3 (Sr 2AlTaO 6) 0.7 substrates were systematically studied. A crossover from ferromagnetic/metallic to non-magnetic/insulating behavior occurs at a critical thickness (~8 nm) that is significantly smaller than LSCO films under larger strains in reported literature. X-ray absorption measurements revealed that the difference of functional properties at reduced film thicknesses was accompanied by changes in the valence state of Co ions at the film/substrate interface.
  • Cited by 1
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  • We report the growth and properties of La{sub 0.7}Sr{sub 0.3}MnO{sub 3}/YBa{sub 2}Cu{sub 3}O{sub 7−δ}/La{sub 0.7}Sr{sub 0.3}MnO{sub 3} LSMO/YBCO/LSMO epitaxial trilayer films, fabricated on SrTiO{sub 3} substrate using pulsed laser deposition technique. From x-ray diffraction and high resolution x-ray diffraction measurements, it is confirmed that the grown trilayered films are single phase and epitaxial in nature. Magneto-transport and magnetic properties are found to be dependent on the thickness of YBCO spacer layer. We infer that for fixed thickness of top and bottom LSMO layers, superconductivity is completely suppressed. At 100 K, the hysteresis loops reveal the ferromagnetic signature of trilayered film.more » At room temperature, we obtain a butterfly type scenario, signifies the co-existence of ferromagnetic and antiferromagnetic interaction. In addition, at room temperature, the YBCO spacer layer allowing the top and bottom LSMO layers to interact antiferromagnetically.« less
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