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Title: Nanocrystalline M-type hexaferrite powders: Preparation, geometric and magnetic properties

Abstract

Co-Ti-Sn-Ge substituted M-type barium hexaferrite powders with mean grain sizes between about 10 nm and about 1 {mu}m and a narrow size distribution were prepared reproducible 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 super paramagnetically 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 or three.

Authors:
; ; ; ;  [1];  [2]; ; ; ;  [3]
  1. Inst. fuer Physikalische Hochtechnologie, Jena (Germany)
  2. Forschungsinstitut fuer Pigmente und Lacke, Stuttgart (Germany)
  3. Univ. de Barcelona, Catalonia (Spain)
Publication Date:
OSTI Identifier:
40194
Report Number(s):
CONF-930860-
Journal ID: IEMGAQ; ISSN 0018-9464; TRN: IM9520%%389
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics
Additional Journal Information:
Journal Volume: 30; Journal Issue: 2Pt2; Conference: EMMA `93: 5th European magnetic materials and applications conference, Kosice (Slovakia), 24-27 Aug 1993; Other Information: PBD: Mar 1994
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BARIUM COMPOUNDS; FABRICATION; MAGNETIC PROPERTIES; FERRITES; COBALT COMPOUNDS; TITANIUM COMPOUNDS; TIN COMPOUNDS; GERMANIUM COMPOUNDS; USES; MICROSTRUCTURE

Citation Formats

Goernert, P., Pfeiffer, H., Sinn, E., Mueller, R., Schueppel, W., Roesler, M., Batlle, X., Garcia del Muro, M., Tejada, J., and Gali, S. Nanocrystalline M-type hexaferrite powders: Preparation, geometric and magnetic properties. United States: N. p., 1994. Web. doi:10.1109/20.312385.
Goernert, P., Pfeiffer, H., Sinn, E., Mueller, R., Schueppel, W., Roesler, M., Batlle, X., Garcia del Muro, M., Tejada, J., & Gali, S. Nanocrystalline M-type hexaferrite powders: Preparation, geometric and magnetic properties. United States. doi:10.1109/20.312385.
Goernert, P., Pfeiffer, H., Sinn, E., Mueller, R., Schueppel, W., Roesler, M., Batlle, X., Garcia del Muro, M., Tejada, J., and Gali, S. Tue . "Nanocrystalline M-type hexaferrite powders: Preparation, geometric and magnetic properties". United States. doi:10.1109/20.312385.
@article{osti_40194,
title = {Nanocrystalline M-type hexaferrite powders: Preparation, geometric and magnetic properties},
author = {Goernert, P. and Pfeiffer, H. and Sinn, E. and Mueller, R. and Schueppel, W. and Roesler, M. and Batlle, X. and Garcia del Muro, M. and Tejada, J. and Gali, S.},
abstractNote = {Co-Ti-Sn-Ge substituted M-type barium hexaferrite powders with mean grain sizes between about 10 nm and about 1 {mu}m and a narrow size distribution were prepared reproducible 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 super paramagnetically 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 or three.},
doi = {10.1109/20.312385},
journal = {IEEE Transactions on Magnetics},
number = 2Pt2,
volume = 30,
place = {United States},
year = {1994},
month = {3}
}