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El Helali, S.; Daoudi, K.; Boudard, M.; Schulman, A.; Acha, C.; Roussel, H.; Oumezzine, M.; Oueslati, M. "Strain dependence of the physical properties of epitaxial La0.7Ca0.3MnO3 thin films grown on LaAlO3 substrates" (2016) Journal of Alloys and Compounds. 655:327-335
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Abstract:

We present a systematic study of the structural, magnetic, electrical and magnetoresistive properties of La0.7Ca0.3MnO3 thin films epitaxially grown on LaAlO3 single crystalline substrates using metal organic deposition process. The evolutions of the lattice parameters and the corresponding strain as a function of the film thickness (20-80 nm) have been investigated using X-ray diffraction measurements. The films were found to be totally relaxed for a thickness around 60 nm. Magnetization and resistance measurements as a function of temperature revealed a direct correlation of the transition temperature from a ferromagnetic state to the paramagnetic state with the film thickness. The temperature dependence of the resistivity (ρ (T)) has been fitted using various theoretical approaches. Below the transition temperature (TP) the ρ (T) graphs were well fitted using the ρ(T) = ρ0 + ATα formula, in which the fitting parameters ρ0 and α have been used to clarify the conduction mechanism. Above TP, the ρ (T) graphs were found to be well fitted using different models including the VRH model and the small polaron model. A magnetoresistance of 91% was measured at 248 K for the for 60 nm thick film under an applied magnetic field of 7 T. As well as a non-volatile resistive switching capacity of 15% on Ag contacts deposited on top of this film. © 2015 Elsevier B.V.

Registro:

Documento: Artículo
Título:Strain dependence of the physical properties of epitaxial La0.7Ca0.3MnO3 thin films grown on LaAlO3 substrates
Autor:El Helali, S.; Daoudi, K.; Boudard, M.; Schulman, A.; Acha, C.; Roussel, H.; Oumezzine, M.; Oueslati, M.
Filiación:Laboratoire de Physico-Chimie des Matériaux, Faculté des Science de Monastir, University of Monastir, Monastir, 5018, Tunisia
Unité Nanomatériaux et Photonique, Faculté des Sciences de Tunis, Tunis El Manar University, El-Manar Tunis, 2092, Tunisia
Department of Applied Physics, College of Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
LMGP, Univ. Grenoble Alpes, CNRS, Grenoble, F-38000, France
Departamento de Física, FCEyN, UBA and IFIBA, Ciudad Universitaria, Conicet, Pabellón 1, Buenos Aires, 1428, Argentina
Palabras clave:Colossal magnetoresistance; LCMO; Strain; Transport properties; Calcium; Colossal magnetoresistance; Deposition; Electron transport properties; Epitaxial growth; Film thickness; Lanthanum alloys; Manganese oxide; Organometallics; Silver; Strain; Temperature; Temperature distribution; Thick films; X ray diffraction; Applied magnetic fields; LCMO; Magnetoresistive property; Metal organic deposition process; Resistance measurement; Single crystalline substrates; Temperature dependence; X-ray diffraction measurements; Thin films
Año:2016
Volumen:655
Página de inicio:327
Página de fin:335
DOI: http://dx.doi.org/10.1016/j.jallcom.2015.09.121
Título revista:Journal of Alloys and Compounds
Título revista abreviado:J Alloys Compd
ISSN:09258388
CODEN:JALCE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09258388_v655_n_p327_ElHelali

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Citas:

---------- APA ----------
El Helali, S., Daoudi, K., Boudard, M., Schulman, A., Acha, C., Roussel, H., Oumezzine, M.,..., Oueslati, M. (2016) . Strain dependence of the physical properties of epitaxial La0.7Ca0.3MnO3 thin films grown on LaAlO3 substrates. Journal of Alloys and Compounds, 655, 327-335.
http://dx.doi.org/10.1016/j.jallcom.2015.09.121
---------- CHICAGO ----------
El Helali, S., Daoudi, K., Boudard, M., Schulman, A., Acha, C., Roussel, H., et al. "Strain dependence of the physical properties of epitaxial La0.7Ca0.3MnO3 thin films grown on LaAlO3 substrates" . Journal of Alloys and Compounds 655 (2016) : 327-335.
http://dx.doi.org/10.1016/j.jallcom.2015.09.121
---------- MLA ----------
El Helali, S., Daoudi, K., Boudard, M., Schulman, A., Acha, C., Roussel, H., et al. "Strain dependence of the physical properties of epitaxial La0.7Ca0.3MnO3 thin films grown on LaAlO3 substrates" . Journal of Alloys and Compounds, vol. 655, 2016, pp. 327-335.
http://dx.doi.org/10.1016/j.jallcom.2015.09.121
---------- VANCOUVER ----------
El Helali, S., Daoudi, K., Boudard, M., Schulman, A., Acha, C., Roussel, H., et al. Strain dependence of the physical properties of epitaxial La0.7Ca0.3MnO3 thin films grown on LaAlO3 substrates. J Alloys Compd. 2016;655:327-335.
http://dx.doi.org/10.1016/j.jallcom.2015.09.121