The antiferromagnetic structures of IrMn3 and their influence on exchange-bias

• DOI: 10.1038/srep02412
• Publication Date: 2013-08-12T09:09:55Z
• Authors: A. Kohn; A. Kovács; R. Fan; G. J. McIntyre; R. C. C. Ward; J. P. Goff
• Keywords: Exchange bias; Cubic crystal system; Magnetic structure; Crystal (programming language)

We have determined the magnetic structures of single-crystal thin-films IrMn3 for crystallographic phases chemically-ordered L12 and chemically-disordered face-centred-cubic, which is phase typically chosen information-storage devices. For thin-film, we find same triangular structure as reported bulk material. determine face-centred-cubic alloy first time, differs from theoretical predictions, with moments tilted away crystal diagonals towards face-planes. study influence these two antiferromagnetic on exchange-bias properties an epitaxial body-centred-cubic Fe layer showing that magnetization reversal mechanism bias-field in ferromagnetic altered significantly. report a change in-plane nucleation 90° domain-walls when coupled to newly cubic rotational process, including out-of-plane component structure.