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000201601 1001_ $$0P:(DE-HGF)0$$aKohn, A.$$b0$$eCorresponding Author
000201601 245__ $$aThe antiferromagnetic structures of IrMn$_{3}$ and their influence on exchange-bias
000201601 260__ $$aLondon$$bNature Publishing Group$$c2013
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000201601 520__ $$aWe have determined the magnetic structures of single-crystal thin-films of IrMn3 for the crystallographic phases of chemically-ordered L12, and for chemically-disordered face-centred-cubic, which is the phase typically chosen for information-storage devices. For the chemically-ordered L12 thin-film, we find the same triangular magnetic structure as reported for the bulk material. We determine the magnetic structure of the chemically-disordered face-centred-cubic alloy for the first time, which differs from theoretical predictions, with magnetic moments tilted away from the crystal diagonals towards the face-planes. We study the influence of these two antiferromagnetic structures on the exchange-bias properties of an epitaxial body-centred-cubic Fe layer showing that magnetization reversal mechanism and bias-field in the ferromagnetic layer is altered significantly. We report a change of reversal mechanism from in-plane nucleation of 90° domain-walls when coupled to the newly reported cubic structure towards a rotational process, including an out-of-plane magnetization component when coupled to the L12 triangular structure.
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000201601 7001_ $$0P:(DE-HGF)0$$aFan, R.$$b2
000201601 7001_ $$0P:(DE-HGF)0$$aMcIntyre, G. J.$$b3
000201601 7001_ $$0P:(DE-HGF)0$$aWard, R. C. C.$$b4
000201601 7001_ $$0P:(DE-HGF)0$$aGoff, J. P.$$b5
000201601 773__ $$0PERI:(DE-600)2615211-3$$a10.1038/srep02412$$gVol. 3$$p2045 - 2322$$tScientific reports$$v3$$x2045-2322$$y2013
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