Lattice structure and magnetization of LaCoO 3 thin films

A. D. Rata (), A. Herklotz, L. Schultz and K. Dörr

The European Physical Journal B: Condensed Matter and Complex Systems, 2010, vol. 76, issue 2, 215-219

Abstract: We investigate the structure and magnetic properties of thin films of the LaCoO 3 compound. Thin films are deposited by pulsed laser deposition on various substrates in order to tune the strain from compressive to tensile. Single-phase (001) oriented LaCoO 3 layers were grown on all substrates despite large misfits. The tetragonal distortion of the films covers a wide range from -2% to 2.8%. Our LaCoO 3 films are ferromagnetic with Curie temperature around 85 K, contrary to the bulk. The total magnetic moment is below 1μ B /Co 3+ , a value relatively small for an exited spin-state of the Co 3+ ions, but comparable to values reported in literature. A correlation of strain states and magnetic moment of Co 3+ ions in LaCoO 3 thin films is observed. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2010

Date: 2010
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DOI: 10.1140/epjb/e2010-00203-6

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