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1994

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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/8582

Nanocrystalline M-type hexaferrite powders: preparation, geometric and magnetic propertiess

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http://dx.doi.org/10.1109/20.312385

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.

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Materials nanoestructurats, Propietats magnètiques, Materials magnètics, Anisotropia, Substàncies amorfes

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Nanostructured materials, Magnetic properties, Magnetic materials, Anisotropy, Amorphous substances

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Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
Articles publicats en revistes (Física de la Matèria Condensada)

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GORNERT, P., et al. Nanocrystalline M-type hexaferrite powders: preparation, geometric and magnetic propertiess. IEEE Transactions on Magnetics. 1994. Vol. 30, num. 2 (Part 1-2), pags. 714-716. ISSN 0018-9464. [consulted: 18 of June of 2026]. Available at: https://hdl.handle.net/2445/8582

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