Growth and properties of c-axis textured La{sub 0.7}Sr{sub 0.3}MnO{sub 3{minus}{delta}} films on SiO{sub 2}/Si substrates with a Bi{sub 4}Ti{sub 3}O{sub 12} template layer

Journal Article · Sat Mar 01 04:00:00 EST 1997 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.118649· OSTI ID:535929

Gu, J Y; Kwon, C; Robson, M C; Trajanovic, Z; Ghosh, K; Sharma, R P; Shreekala, R; Rajeswari, M; Venkatesan, T; Ramesh, R ^[1]; Noh, T W ^[2]

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1. Department of Physics, Center for Superconductivity Research, University of Maryland, College Park, Maryland 20742 (United States)
2. Department of Physics, Seoul National University, Seoul 151-742 (Korea)

c-axis textured La{sub 0.7}Sr{sub 0.3}MnO{sub 3{minus}{delta}} (LSMO) films were fabricated on SiO{sub 2}/Si(001) substrates using a Bi{sub 4}Ti{sub 3}O{sub 12} (BTO) template layer. Electrical and magnetic properties of LSMO were investigated. The LSMO/BTO layer of this structure has no in-plane alignment. Even though a ferromagnetic transition temperature, T{sub C}, is as high as that of the epitaxial LSMO film (360 K), a resistivity peak temperature, T{sub P}, is about 140 K lower than T{sub C}. The resistivity behavior as a function of temperature for LSMO/BTO/SiO{sub 2}/Si films is found to be dominated by grain boundary effects. Low field sensitive magnetoresistance which suggests spin tunneling through the grain boundaries is also observed at room temperature. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 535929
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 70; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CURIE POINT
ELECTRIC CONDUCTIVITY
FERROMAGNETIC MATERIALS
FERROMAGNETISM
GRAIN BOUNDARIES
LANTHANUM OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETORESISTANCE
MANGANESE OXIDES
STRONTIUM OXIDES
TEMPERATURE DEPENDENCE
TEXTURE
THIN FILMS
TITANIUM OXIDES
pulsed laser deposition