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Structure related magnetic properties of MnZn ferrite with ultra-fine grain structure

Published online by Cambridge University Press:  12 June 2003

J. Moulin ,
F. Mazaleyrat ,
Y. Champion ,
P. Langlois ,
M. Lécrivain ,
J. M. Grenèche ,
D. Michel  and
R. Barrué
J. Moulin*
Affiliation:
LESiR-ENS de Cachan, 61 avenue du Pdt. Wilson, 94235 Cachan Cedex, France
F. Mazaleyrat
Affiliation:
LESiR-ENS de Cachan, 61 avenue du Pdt. Wilson, 94235 Cachan Cedex, France
Y. Champion
Affiliation:
CECM-CNRS, 15 rue Georges Urbain, 94407 Vitry-sur-Seine Cedex, France
P. Langlois
Affiliation:
LIMHP-UPR CNRS 1311, Université Paris Nord, 99 avenue J.B. Clément, 93430 Villetaneuse, France
M. Lécrivain
Affiliation:
LESiR-ENS de Cachan, 61 avenue du Pdt. Wilson, 94235 Cachan Cedex, France
J. M. Grenèche
Affiliation:
LPEC-UMR CNRS 6087, Université du Maine, avenue Olivier Messiaen, 72085 Le Mans Cedex 09, France
D. Michel
Affiliation:
CECM-CNRS, 15 rue Georges Urbain, 94407 Vitry-sur-Seine Cedex, France
R. Barrué
Affiliation:
LESiR-ENS de Cachan, 61 avenue du Pdt. Wilson, 94235 Cachan Cedex, France
*
[email protected]
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Abstract

Nanostructured ferrites have been prepared by milling starting from commercial ferrite powders. Subsequent compaction and sintering were applied to obtain cylindrical pieces. The magnetization as a function of the grain size follows the non magnetic grain boundary (NMGB) model. The boundary thickness is estimated as about 1.5 nm, which is consistent with that calculated from the Mössbauer absorption areas. Due to the high lattice distortion, the small exchange length impedes the averaging of the anisotropy.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 23 , Issue 1 , July 2003 , pp. 49 - 54
Copyright
© EDP Sciences, 2003

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