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Títol:	Nanocrystalline M-type hexaferrite powders: preparation, geometric and magnetic propertiess
Autor/a:	Gornert, P.; Pfeiffer, H.; Sinn, E.; Muller, Rainer; Schuppel, W.; Rosler, M.; Batlle Gelabert, Xavier; García del Muro y Solans, Montserrat; Tejada Palacios, Javier; Galí Medina, Salvador, 1949-
Altres autors:	Universitat de Barcelona
Abstract:	Co-Ti-Sn-Ge substituted M-type bariumhexaferrite powders with mean grain sizes between about 10 nm and about 1 ¿m and a narrow size distribution were prepared reproducibly by means of a modified glass crystallization method. At annealing temperatures between 560 and 580°C of the amorphous flakes nanocrystalline particles grow. They behave superparamagnetically at room temperature and change into stable magnetic single domains at lower temperatures. The magnetic volume of the powders is considerably less than the geometric one. However, the effective anisotropy fields are larger by a Factor of two to three.
Matèries:	-Materials nanoestructurats -Propietats magnètiques -Materials magnètics -Anisotropia -Substàncies amorfes -Nanostructured materials -Magnetic properties -Magnetic materials -Anisotropy -Amorphous substances
Drets:	(c) IEEE, 1994
Tipus de document:	Article Article - Versió publicada
Publicat per:	IEEE
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