2026-06-27T16:21:30Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/427772023-08-28T18:43:33Zcom_20.500.14352_14col_20.500.14352_15

Serrano, A., A. Plaza, M. Pérez García, Lucas Venta, J. de la LLopis, J. García, M. A. 2023-06-20T00:35:45Z 2023-06-20T00:35:45Z 2009-04 1098-0121 10.1103/PhysRevB.79.144405 https://hdl.handle.net/20.500.14352/42777 http://dx.doi.org/10.1103/PhysRevB.79.144405 https://journals.aps.org We report here the observation of ferromagnetism (FM) at 300 K in mixtures of TiO₂ and Co₃O₄ powders despite the antiferromagnetic and diamagnetic characters of both oxides, respectively. The ferromagnetic behavior is found in the early stages of reaction and only for TiO₂ in anatase structure; no FM is found for identical samples prepared with rutile-TiO². Optical spectroscopy and x-ray absorption spectra confirm a surface reduction of octahedral Co^(+3) -> Co^(+2) in the mixtures which is in the origin of the observed magnetism. eng open access Room-temperature ferromagnetism in the mixtures of the TiO₂ and Co₃O₄ powders journal article