Barium ferrite ball milled in vacuum

S. J. Campbell; E. Wu; W. A. Kaczmarek; G. Wang

doi:10.1023/a:1010806609835

Barium ferrite ball milled in vacuum

S. J. Campbell^*, E. Wu, W. A. Kaczmarek, G. Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The structural and magnetic behaviour of BaFe₁₂O₁₉ subjected to milling in vacuum for 1000 h has been investigated by x-ray powder diffraction and Mössbauer 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°C is accompanied by a six fold enhancement in the magnetic coercivity. This behaviour is linked with the fine crystallites.

Original language	English
Pages (from-to)	243-246
Number of pages	4
Journal	Hyperfine Interactions
Volume	112
Issue number	1-4
DOIs	https://doi.org/10.1023/a:1010806609835
Publication status	Published - 1998

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abstract = "The structural and magnetic behaviour of BaFe12O19 subjected to milling in vacuum for 1000 h has been investigated by x-ray powder diffraction and M{\"o}ssbauer 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°C is accompanied by a six fold enhancement in the magnetic coercivity. This behaviour is linked with the fine crystallites.",

author = "Campbell, {S. J.} and E. Wu and Kaczmarek, {W. A.} and G. Wang",

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AU - Wu, E.

AU - Kaczmarek, W. A.

AU - Wang, G.

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N2 - The structural and magnetic behaviour of BaFe12O19 subjected to milling in vacuum for 1000 h has been investigated by x-ray powder diffraction and Mössbauer 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°C is accompanied by a six fold enhancement in the magnetic coercivity. This behaviour is linked with the fine crystallites.

AB - The structural and magnetic behaviour of BaFe12O19 subjected to milling in vacuum for 1000 h has been investigated by x-ray powder diffraction and Mössbauer 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°C is accompanied by a six fold enhancement in the magnetic coercivity. This behaviour is linked with the fine crystallites.

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SP - 243

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JO - Hyperfine Interactions

JF - Hyperfine Interactions

IS - 1-4

ER -

Barium ferrite ball milled in vacuum

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