Magnetotransport properties of c-axis oriented La{sub 0.7}Sr{sub 0.3}MnO{sub 3} thin films on MgO-buffered SiO{sub 2}/Si substrates

Journal Article · Wed Apr 01 04:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3065974· OSTI ID:21190163

Kang, Young-Min; Ulyanov, Alexander N; Shin, Geo-Myung; Lee, Sung-Yun; Yoo, Dae-Gil; Yoo, Sang-Im ^[1]

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1. Department of Materials Science and Engineering, Seoul National University, Seoul 151-744 (Korea, Republic of)

c-axis oriented La{sub 0.7}Sr{sub 0.3}MnO{sub 3} (LSMO) films on MgO-buffered SiO{sub 2}/Si substrates were prepared, and their texture, microstructure, and magnetotransport properties were studied and compared to epitaxial LSMO/MgO (001) and polycrystalline LSMO/SiO{sub 2}/Si films. c-axis oriented MgO buffer layers were obtained on amorphous SiO{sub 2} layer through rf sputter deposition at low substrate temperature and consequent postannealing processes. In situ pulsed laser deposition-grown LSMO films, deposited on the MgO layer, show strong c-axis texture, but no in-plane texture. The c-axis oriented LSMO films which are magnetically softer than LSMO/SiO{sub 2}/Si films exhibit relatively large low field magnetoresistance (LFMR) and sharper MR drop at lower field. The large LFMR is attributed to a spin-dependent scattering of transport current at the grain boundaries.

• OSTI ID: 21190163
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 105; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRYSTAL STRUCTURE
ENERGY BEAM DEPOSITION
EPITAXY
GRAIN BOUNDARIES
LANTHANUM COMPOUNDS
LASER RADIATION
MAGNESIUM OXIDES
MAGNETISM
MAGNETORESISTANCE
MANGANATES
POLYCRYSTALS
PULSED IRRADIATION
SILICON
SILICON OXIDES
SPUTTERING
STRONTIUM COMPOUNDS
SUBSTRATES
TEXTURE
THIN FILMS