Porous and dense perovskite films
2008 (English)In: NANOSTRUCTURED MATERIALS AND NANOTECHNOLOGY / [ed] Mathur, S; Singh, M, 2008, Vol. 28, no 6, 153-163 p.Conference paper (Refereed)
La0.5Sr0.5CoO3 (LSCO) and La 0.67Ca0.33MnO3 (LCMO) films were prepared by sol-gel techniques and their structural and transport properties investigated. Films were spin-coated onto (001) LaAlO3 (LAO), (001) SrTiO 3 (STO), Pt/TiO2/SiO2/Si, and Al 2O3 substrates, and heated to 800C. The structural properties were investigated using X-ray diffraction, scanning and transmission electron microscopy (SEM and TEM). SEM studies showed that the films were crack-free and adhered well to the substrates. No preferential orientation of the perovskite films was observed on Si- or Pt/TiO2/SiO 2/Si-substrates, but films deposited on LAO and STO showed good alignment with the substrate. Transport measurements of epitaxial LCMO films show maximum temperature coefficient of resistivity (TCR) of 6.1% K-1 at 241 K and colossal magnetoresistance (CMR) of 32% at 246 K. The conductivity LSCO polycrystalline film was 1.7 mcm, while a epitaxial film had a conductivity of around 1.9 mcm.
Place, publisher, year, edition, pages
2008. Vol. 28, no 6, 153-163 p.
, Ceramic Engineering and Science Proceedings, ISSN 0196-6219 ; 28
Substrates, Calcium, Ceramic materials, Cobalt compounds, Colloids, Colossal magnetoresistance, Electric resistance, Epitaxial films, Gelation, Lanthanum, Magnetic field effects, Magnetoresistance, Manganese compounds, Nanostructured materials, Oxide minerals, Perovskite, Semiconducting silicon compounds, Silicon, Silicon compounds, Transmission electron microscopy, Transport properties
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:kth:diva-59899ISI: 000281438800017ScopusID: 2-s2.0-57649198640OAI: oai:DiVA.org:kth-59899DiVA: diva2:476634
31st International Cocoa Beach Conference on Advanced Ceramics and Composites. Daytona Beach, FL. JAN 21-26, 2007
QC 201201272012-01-122012-01-122012-01-27Bibliographically approved