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Epitaxial growth of La0.7Ba0.3MnO3 thin films on MgO substrates: Structural, magnetic, and transport properties (Articolo in rivista)

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Epitaxial growth of La0.7Ba0.3MnO3 thin films on MgO substrates: Structural, magnetic, and transport properties (Articolo in rivista) (literal)

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Orgiani, P; Adamo, C; Barone, C; Galdi, A; Pagano, S; Petrov, AY; Quaranta, O; Aruta, C; Ciancio, R; Polichetti, M; Zola, D; Maritato, L (2008)
Epitaxial growth of La0.7Ba0.3MnO3 thin films on MgO substrates: Structural, magnetic, and transport properties
in Journal of applied physics; American Institute Of Physics (AIP), Melville (Stati Uniti d'America)
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Orgiani, P; Adamo, C; Barone, C; Galdi, A; Pagano, S; Petrov, AY; Quaranta, O; Aruta, C; Ciancio, R; Polichetti, M; Zola, D; Maritato, L (literal)

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\"[Orgiani, P.; Adamo, C.; Barone, C.; Galdi, A.; Pagano, S.; Petrov, A. Yu.; Quaranta, O.; Ciancio, R.; Polichetti, M.; Zola, D.] Univ Salerno, Dipartimento Fis, I-84081 Baronissi, SA, Italy; [Aruta, C.] Univ Roma Tor Vergata, Dipartimento Ingn Meccan, I-00133 Rome, Italy; [Aruta, C.] CNR INFM Coherentia, I-00133 Rome, Italy; [Maritato, L.] Univ Salerno, Dipartimento Matemat & Informat, I-84081 Baronissi, SA, Italy; [Orgiani, P.; Adamo, C.; Barone, C.; Galdi, A.; Pagano, S.; Petrov, A. Yu.; Quaranta, O.; Maritato, L.] CNR INFM Coherentia, I-84081 Baronissi, SA, Italy; [Ciancio, R.; Polichetti, M.; Zola, D.] CNR INFM SuperMat, I-84081 Baronissi, SA, Italy (literal)

Titolo

Epitaxial growth of La0.7Ba0.3MnO3 thin films on MgO substrates: Structural, magnetic, and transport properties (literal)

Abstract

We report on structural, magnetic, and transport properties of La0.7Ba0.3MnO3 thin films, epitaxially grown on MgO substrates. Despite the quite similar structural features if compared to crystalline manganite films, our samples show a metal-insulator transition temperature of about 200 K, sizeably lower than the bulk-value (T-MI similar or equal to 345 K). Moreover, the magnetotransport properties show the absence of saturation in the magnetoresistance and localization phenomena at low temperatures (T < 30 K). The temperature behavior of the magnetization shows a Curie temperature T-c value above room temperature, ruling out effects due to oxygen deficiency. All these findings are analyzed in terms of possible physical mechanisms related to the growth in the presence of large mismatch between film and substrate lattice parameters. (c) 2008 American Institute of Physics. (literal)

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