Substrate influence on the growth of Co-doped La0.5Sr0.5TiO3−δ epitaxial thin films

R. Ranchal, M. Bibes, A. Barthélémy, K. Bouzehouane, S. Guyard, E. Jacquet, J.-P Contour, C. Pascanut, P. Berthet, N. Dragoe

doi:10.1063/1.1938278

Substrate influence on the growth of Co-doped La0.5Sr0.5TiO3−δ epitaxial thin films

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R. Ranchal

Ciudad Universitaria s/n Madrid 28040 Departamento Física de Materiales, Facultad de Ciencias Físicas (UCM), , Spain
M. Bibes

Université Paris-Sud Institut d’Electronique Fondamentale, , 91405 Orsay, France
A. Barthélémy

Unité Mixte de Physique Centre National de la Recerche Scientifique (CNRS)-Thales , Domaine de Corbeville, 91404 Orsay, France
K. Bouzehouane

Unité Mixte de Physique Centre National de la Recerche Scientifique (CNRS)-Thales , Domaine de Corbeville, 91404 Orsay, France
S. Guyard

Unité Mixte de Physique Centre National de la Recerche Scientifique (CNRS)-Thales , Domaine de Corbeville, 91404 Orsay, France
E. Jacquet

Unité Mixte de Physique Centre National de la Recerche Scientifique (CNRS)-Thales , Domaine de Corbeville, 91404 Orsay, France
J.-P Contour

Unité Mixte de Physique Centre National de la Recerche Scientifique (CNRS)-Thales , Domaine de Corbeville, 91404 Orsay, France
C. Pascanut

Université Paris-Sud Laboratoire de Physico-Chimie de l'Etat Solide, Bâtiment 414, , 91405 Orsay, France
P. Berthet

Université Paris-Sud Laboratoire de Physico-Chimie de l'Etat Solide, Bâtiment 414, , 91405 Orsay, France
N. Dragoe

Université Paris-Sud Laboratoire de Physico-Chimie de l'Etat Solide, Bâtiment 414, , 91405 Orsay, France

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説明

<jats:p>We report on the growth of thin films of the diluted magnetic oxide Co-doped La0.5Sr0.5TiO3−δ on SrTiO3 and LaAlO3 substrates. The films are ferromagnetic at room temperature, with no indications of parasite phases from high-resolution x-ray diffraction experiments. The structural mismatch with the substrate is shown to have a strong impact on the growth mechanisms and, consequently, on the surface morphology. In this sense, to grow the films on SrTiO3, for which the mismatch is minimized, appears to be more appropriate for the future integration of Co-doped La0.5Sr0.5TiO3−δ layers into heterostructures for perpendicular transport.</jats:p>