RT Journal Article
T1 Room-temperature ferromagnetism in the mixtures of the TiO₂ and Co₃O₄ powders
A1 Serrano, A., A.
A1 Plaza, M.
A1 Pérez García, Lucas
A1 Venta, J. de la
A1 LLopis, J.
A1 García, M. A.
AB 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.
PB American Physical Society
SN 1098-0121
YR 2009
FD 2009-04
LK https://hdl.handle.net/20.500.14352/42777
UL https://hdl.handle.net/20.500.14352/42777
LA eng
NO ©2009 The American Physical Society.Artículo firmado por más de diez autores.This work was supported by the Spanish Council for Scientific Research through the CSIC Projects No. 2006- 50F0122 and No. 2007-50I015 and Spanish Ministry of Science and Education through the Projects No. MAT2007- 66845-C02-01 and No. FIS-2008-06249. We acknowledge the European Synchrotron Radiation Facility for provision of synchrotron radiation facilities, and we would like to thank the SpLine CRG Beamline staff for assistance during x-ray absorption experiments.
NO Ministerio de Ciencia y Educación
NO Spanish Council for Scientific Research
DS Docta Complutense
RD 9 abr 2025