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A Co-59 NMR study to observe the effects of ball milling on small ferromagnetic cobalt particles

Research output: Contribution to journalJournal articlepeer-review

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  • R. J. (Richard J.) Speight
  • Alan Wong
  • P. Ellis
  • T. Hyde
  • P. T. Bishop
  • Mark E. Smith
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<mark>Journal publication date</mark>1/04/2009
<mark>Journal</mark>Solid State Nuclear Magnetic Resonance
Issue number2
Volume35
Number of pages7
Pages (from-to)67-73
Publication StatusPublished
<mark>Original language</mark>English

Abstract

To demonstrate the potential of nuclear magnetic resonance (NMR) spectroscopy for investigating detailed structural properties in ferromagnetic materials, three different particle sized cobalt (Co) powders have been ball milled for 24 h are accurately characterised by internal-field Co-59 NMR. The Co-59 NMR spectra show distinct resonance bands corresponding to the different Co sites. face-centred-cubic (fcc), hexagonal-close-packed (hcp) and stacking faults (sfs), in Co metal powders. The hcp+fcc-->hcp phase transition encouraged by ball-milling was observed and quantitative values for each Co environment were obtained. (C) 2008 Elsevier Inc. All rights reserved.