Structural and electrical characterisation of La0.5Ca0.5MnO3 thin films grown by pulsed laser deposition
| Autor: | G. Polla, P. Levy, M.C. Terzzoli, Ricardo R. Urbano, F. Parisi, Diego Rubi, G. Leyva, S. Duhalde |
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| Rok vydání: | 2002 |
| Předmět: |
Materials science
Magnetoresistance Analytical chemistry Substrate (electronics) Electrical and Electronic Engineering Thin film Metal–insulator transition Condensed Matter Physics Manganite Yttria-stabilized zirconia Electronic Optical and Magnetic Materials Pulsed laser deposition Perovskite (structure) |
| Zdroj: | Physica B: Condensed Matter. 320:86-89 |
| ISSN: | 0921-4526 |
| Popis: | Thin films of perovskite manganite, with nominal composition La0.5Ca0.5MnO3, have been prepared by pulsed laser deposition on (1 0 0) SrTiO3, (1 0 0) LaAlO3, (1 0 0) Si and YSZ/CeO2-buffered (1 0 0) Si substrates. Structural and electrical characterisation was performed on the films. The magneto-transport properties of all the thin films depart from the bulk behaviour. The LCMO film grown on buffered Si shows an insulator–metallic transition around 130–150 K while the one deposited directly on Si displayed a similar behaviour under a melting field of 1 T. However, that transition is absent in the films grown on LAO and STO. We suggest that appropriate stress values induced by the substrate favour the formation of metallic percolative paths. |
| Databáze: | OpenAIRE |
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