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- W4287641022 abstract "We provide a complete and systematic first-principles study of the thermodynamic stability, structural parameters, and magnetic properties of the T1 non-collinear antiferromagnetic L1$_2$-IrMn$_3$ surface and L1$_2$-IrMn$_3$/Fe heterostructure. Furthermore, we investigate the exchange-bias effect in the heterostructure and describe its previously unknown complex magnetic coupling at the interface. We consider four atomic configurations and four magnetic arrangements, finding two stable terminations for the surface and for the heterostructure, which are in good agreement with experimental HR-TEM data. Using a comparative approach to analyze the exchange-bias properties of the heterostructure, we discover that the number of Mn-Fe interactions is related to the exchange bias intensity. This finding could lead to novel exchange-bias tailoring methods by controlling the termination of the layers. Finally, we are able to accurately describe the interface magnetic coupling atom-by-atom, and we find a relationship between the antiferromagnetic order at the interface and the stability of the heterostructure. Our analysis provides a possible mechanism for the appearance of exchange bias in non-collinear/collinear heterostructures, and it is in good agreement with experimental hysteresis measurements of the IrMn$_3$/Fe system." @default.
- W4287641022 created "2022-07-25" @default.
- W4287641022 creator A5011173370 @default.
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- W4287641022 date "2020-10-14" @default.
- W4287641022 modified "2023-10-10" @default.
- W4287641022 title "Understanding the non-collinear antiferromagnetic IrMn$_3$ surfaces and their exchange-biased heterostructures from first principles" @default.
- W4287641022 doi "https://doi.org/10.48550/arxiv.2010.07371" @default.
- W4287641022 hasPublicationYear "2020" @default.
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