Synthesis and characterisation of (Fe,Co) sub(2-3)B microcrystalline alloys

The promising high magnetocrystalline anisotropy of about K sub(1) > 0.4 MJ/m super(3) has been derived for (Fe,Co) sub(2-3)B melt-spun ribbons leading to a potential candidate for novel hard magnetic applications. We present the microstructural and magnetic analysis of the phase relations in var...

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Published inJournal of alloys and compounds Vol. 644; pp. 199 - 204
Main Authors Wallisch, Wolfgang, Fidler, Josef, Toson, Peter, Sassik, Herbert, Svagera, Robert, Bernardi, Johannes
Format Journal Article
LanguageEnglish
Published 25.09.2015
Subjects
Alloys
Anisotropy
Magnetic properties
Mathematical analysis
Melt spinning
Optimization
Ribbons
Transmission electron microscopy
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Summary:The promising high magnetocrystalline anisotropy of about K sub(1) > 0.4 MJ/m super(3) has been derived for (Fe,Co) sub(2-3)B melt-spun ribbons leading to a potential candidate for novel hard magnetic applications. We present the microstructural and magnetic analysis of the phase relations in various microcrystalline alloys with a nominal composition of (Fe sub(1-x)Co sub( x)) sub(71)B sub(29) (0 [< or =, slant] x [< or =, slant] 1) by means of SEM and TEM investigations. The melt-spun ribbons were prepared at different wheel speeds (18-38 m/s) and annealed at 500 [degrees]C for one hour. The optimum hard magnetic properties were obtained for (Fe sub(0.7)Co sub(0.3)) sub(71)B sub(29) at 26.7 m/s. The crystal anisotropy and saturation polarisation have been confirmed by DFT calculations.
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ISSN:0925-8388
DOI:10.1016/j.jallcom.2015.04.179