[en] The mechanism of the $\alpha$-$\epsilon$ transition in iron is reconsidered. A path in the Burgers description of the bcc/hcp transition, different from those previously considered, is proposed. It relies on the assumption that shear and shuffle are decoupled and require some peculiar magnetic order, different from that of $\alpha$ and $\epsilon$ phases as found in density-functional theory. Finally, we put forward an original mechanism for this transition, based on the successive shuffle motion of layers, which is akin to a nucleation-propagation process rather than to some uniform motion.
Disciplines :
Physics
Author, co-author :
Dupé, Bertrand ; Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures
Amadon, Bernard
Pellegrini, Yves-Patrick
Denoual, Christophe
Language :
English
Title :
Mechanism for the alpha -> epsilon phase transition in iron
Publication date :
2013
Journal title :
Physical Review. B, Condensed Matter and Materials Physics
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