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Título:
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Room-temperature ferromagnetism in the mixtures of the TiO? and Co?O? powders
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Autores:
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Serrano, A., A. ;
Plaza, M. ;
Pérez García, Lucas ;
Venta, J. de la ;
LLopis, J. ;
García, M. A.
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Tipo de documento:
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texto impreso
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Editorial:
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American Physical Society, 2009-04
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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We report here the observation of ferromagnetism (FM) at 300 K in mixtures of TiO? and Co?O? 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 TiO? 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.
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En línea:
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https://eprints.ucm.es/45455/1/P%C3%A9rezLucas%2005%20libre.pdf
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