9 T high magnetic field annealing effects on FeN bulk sample

Yanfeng Jiang, Vivekanand Dabade, Michael P. Brady, Orlando Rios, Richard D. James, Jian Ping Wang

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11 Scopus citations

Abstract

α″ -Fe16N2 has been suggested as a promising candidate for future rare-earth-free magnets. In this paper, we report to use high magnetic field (9T) assisted post-annealing process to enhance the Fe16N2 phase formation in FeN bulk rod samples during the α′ → α″ phase transformation and thus improve its magnetic properties. It was found by X-ray Diffraction measurement that the volume ratio of Fe16N2 phase was increased up to 22%, which corresponds to an increase in the amount of transformation from α′ → α″ up to 78%. Also, the saturation magnetization (Ms) of the prepared FeN rod sample was increased to 227emu/g with its coercivity up to 376Oe at room temperature. A working mechanism for the high field assisted post-annealing process was presented.

Original languageEnglish (US)
Article number17A758
JournalJournal of Applied Physics
Volume115
Issue number17
DOIs
StatePublished - May 7 2014

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