Published December 1998 | Version v1
Journal article Metadata-only

Barium Ferrite Ball Milled in Vacuum

Creators

  • 1. University of New South Wales, Australian Defence Force Academy, School of Physics, University College (Australia)
  • 2. Australian National University, Department of Applied Mathematics, Research School of Physical Sciences and Engineering (Australia)

Description

The structural and magnetic behaviour of BaFe12O19 subjected to milling in vacuum for 1000 h has been investigated by x-ray powder diffraction and Moessbauer effect spectroscopy techniques. Pronounced structural disorder is obtained along with partial decomposition of BaFe12O19 to α-Fe2O3 and evidence for superparamagnetic relaxation effects due to the fine particles produced on milling. Restoration of the fully crystallised BaFe12O19 structure on annealing at 1000 deg. C is accompanied by a six fold enhancement in the magnetic coercivity. This behaviour is linked with the fine crystallites

Additional details

Identifiers

DOI
10.1023/A:1010806609835;

Publishing Information

Journal Title
Hyperfine Interactions
Journal Volume
112
Journal Issue
1-4
Journal Page Range
p. 243-246
ISSN
0304-3843
CODEN
HYINDN

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
40058560
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ANNEALING; BARIUM COMPOUNDS; BIOLOGICAL RECOVERY; COERCIVE FORCE; DECOMPOSITION; FERRITES; IRON OXIDES; MILLING; MOESSBAUER EFFECT; PARTICLES; RELAXATION; SPECTROSCOPY; SUPERPARAMAGNETISM; X-RAY DIFFRACTION
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; COHERENT SCATTERING; DIFFRACTION; FERRIMAGNETIC MATERIALS; HEAT TREATMENTS; IRON COMPOUNDS; MACHINING; MAGNETIC MATERIALS; MAGNETISM; MATERIALS; OXIDES; OXYGEN COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS

Optional Information

Copyright
Copyright (c) 1998 Kluwer Academic Publishers