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Título:
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Structural, magnetic and dielectric properties of the novel magnetic spinel compounds ZnCoSnO? and ZnCoTiO?
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Autores:
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Ruiz León, Domingo ;
Mompean, Federico ;
Prado Gonja, Jesús ;
Marco, José F. ;
García Hernandez, Mar ;
Schmid, Rainer
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science BV, 2018-12
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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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The transparent semiconductor Zn?SnO? with cubic spinel structure and the isostructural Zn?Ti?O have been magnetically doped with Co^(2++) ZnCoSnO? and ZnCoTiO? exhibit ferrimagnetism below TN ? 13 K and TN ? 17 K. Ferrimagnetic moments are evident in M vs H curves below TN by small hysteresis. Fits to strictly linear Curie-Weiss plots above TN give µ_(eff) ? to 4.86 µ(B) and a ? to 4.91 µB for ZnCoSnO? and ZnCoTiO?, above theoretical predictions. Impedance spectroscopy data from sintered ceramic can be fitted with a standard equivalent circuit model based on two RC elements for bulk and GB areas. The relative dielectric permittivity of the bulk is ? 20 and ? to 30 for Zn?SnO? and Zn?TiO?. The semiconducting ZnCoSn SnO? and ZnCoTiO?ceramics exhibit bulk resistivity of ? to 1 10?? cm and ? to 1 10? ?cm at 560 K (287°C), and bulk activation energies of EA ? to 1.2 eV and 1.1 eV.
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En línea:
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https://eprints.ucm.es/49873/1/SCHMIDT%2C%20R%2002%20preprint.pdf
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