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|Type:||Artigo de periódico|
|Title:||Structural And Electrical Characterisation Of La0.5ca0.5mno3 Thin Films Grown By Pulsed Laser Deposition|
|Abstract:||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. © 2002 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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