@article{f765d46fb7a44c83b8ae1ccd24ff3542,
title = "The antiferromagnetic structures of IrMn 3 and their influence on exchange-bias",
abstract = "We have determined the magnetic structures of single-crystal thin-films of IrMn 3 for the crystallographic phases of chemically-ordered L1 2, and for chemically-disordered face-centred-cubic, which is the phase typically chosen for information-storage devices. For the chemically-ordered L1 2 thin-film, we find the same triangular magnetic structure as reported for the bulk material. We determine the magnetic structure of the chemically-disordered face-centred-cubic alloy for the first time, which differs from theoretical predictions, with magnetic moments tilted away from the crystal diagonals towards the face-planes. We study the influence of these two antiferromagnetic structures on the exchange-bias properties of an epitaxial body-centred-cubic Fe layer showing that magnetization reversal mechanism and bias-field in the ferromagnetic layer is altered significantly. We report a change of reversal mechanism from in-plane nucleation of 90domain-walls when coupled to the newly reported cubic structure towards a rotational process, including an out-of-plane magnetization component when coupled to the L1 2 triangular structure.",
author = "A. Kohn and A. Kov{\'a}cs and R. Fan and McIntyre, {G. J.} and Ward, {R. C.C.} and Goff, {J. P.}",
note = "Funding Information: We are grateful to Mr. Keith Belcher for technical support, to the Institut Laue-Langevin for the allocation of neutron beam time, and to the Engineering and Physical Sciences Research Council (EPSRC UK) for funding this research project. We thank Dr Erik Samwell for assistance with vector magnetometry.",
year = "2013",
doi = "10.1038/srep02412",
language = "אנגלית",
volume = "3",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Research",
}