2005/03/29 by Dirk Fuchs, D. Fuchs, P. Schweiss +8
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Physics of Superconductivity and Magnetism #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0503663
arxiv created 2005/03/29 · openalex publication_date 2005/03/29 · arxiv updated 2009/12/01 · openalex created_date 2022/10/02 · openalex updated_date 2026/07/28
We show for the system La1-xCexCoO3 (0.1 <= x <= 0.4) that it is possible to\nsynthesize electron-doped cobaltites by the growth of epitaxial thin films. For\nLa1-xCexCoO3, ferromagnetic order is observed within the entire doping range\n(with the maximum of the Curie temperature, Tc, at x ca. 0.3), resulting in a\nmagnetic phase diagram similar to that of hole-doped lanthanum cobaltites. The\nmeasured spin values strongly suggest an intermediate-spin state of the Co ions\nwhich has been also found in the hole-doped system. In contrast to the\nhole-doped material, however, where Tc is well above 200 K, we observe a strong\nsuppression of the maximum Tc to about 22 K. This is likely to be caused by a\nconsiderable decrease of the Co3d - O2p hybridization. The observed intriguing\nmagnetic properties are in agreement with previously reported theoretical\nresults.\n