Structural and magnetic properties of Co-doped (La,Sr)TiO3 epitaxial thin films probed using x-ray magnetic circular dichroism

• Published in: Journal of physics. Condensed matter Vol. 21; no. 40; pp. 406001 - 406001 (6)
• Main Authors: Copie, O, Rode, K, Mattana, R, Bibes, M, Cros, V, Herranz, G, Anane, A, Ranchal, R, Jacquet, E, Bouzehouane, K, Arrio, M-A, Bencok, P, Brookes, N B, Petroff, F, Barthélémy, A
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 07.10.2009; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Other interactions of matter with particles and radiation; Physics; X-ray absorption and absorption edges; Thin films; Epitaxial layers; Lanthanum Strontium Titanates Mixed; Impurities; X-ray absorption spectra; Doping; Impurity site; Magnetic circular dichroism; Pulsed laser deposition; Cobalt additions; XRD; Magnetic properties
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/21/40/406001

We report a study of Co-doped La0.37Sr0.63TiO3-delta thin films grown by pulsed laser deposition in various oxygen pressure conditions. X-ray absorption spectroscopy and magnetic circular dichroism measurements at the Co L2,3 edges reveal that the cobalt mainly substitutes for the titanium and is in an ionic state. Nevertheless, in some films, indications of additional cobalt metallic impurities were found, suggesting that the intrinsic character of this magnetic system remains questionable.