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Imprinting of Antiferromagnetic Vortex States in NiO-Fe Nanostructures

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Title: Imprinting of Antiferromagnetic Vortex States in NiO-Fe Nanostructures
Authors: Ślęzak, M., Wagner, T., Bharadwaj, V. K., Gomonay, O., Kozioł-Rachwał, A., Menteş, T. O., Locatelli, A., Zając, M., Wilgocka-Ślęzak, D., Dróżdż, P., Ślęzak, T.
Publication Year: 2024
Collection: Condensed Matter
Subject Terms: Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
More Details: Magnetic vortices are topological spin structures frequently found in ferromagnets, yet novel to antiferromagnets. By combining experiment and theory, we demonstrate that in a nanostructured antiferromagnetic-ferromagnetic NiO(111)-Fe(110) bilayer, a magnetic vortex is naturally stabilized by magnetostatic interactions in the ferromagnet and is imprinted onto the adjacent antiferromagnet via interface exchange coupling. We use micromagnetic simulations to construct a corresponding phase diagram of the stability of the imprinted antiferromagnetic vortex state. Our in depth analysis reveals that the interplay between interface exchange coupling and the antiferromagnet magnetic anisotropy plays a crucial role in locally reorienting the N\'eel vector out-of-plane in the prototypical in-plane antiferromagnet NiO and thereby stabilizing the vortices in the antiferromagnet.
Document Type: Working Paper
Access URL: http://arxiv.org/abs/2403.05151
Accession Number: edsarx.2403.05151
Database: arXiv
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  Data: Imprinting of Antiferromagnetic Vortex States in NiO-Fe Nanostructures
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  Data: <searchLink fieldCode="AR" term="%22Ślęzak%2C+M%2E%22">Ślęzak, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Wagner%2C+T%2E%22">Wagner, T.</searchLink><br /><searchLink fieldCode="AR" term="%22Bharadwaj%2C+V%2E+K%2E%22">Bharadwaj, V. K.</searchLink><br /><searchLink fieldCode="AR" term="%22Gomonay%2C+O%2E%22">Gomonay, O.</searchLink><br /><searchLink fieldCode="AR" term="%22Kozioł-Rachwał%2C+A%2E%22">Kozioł-Rachwał, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Menteş%2C+T%2E+O%2E%22">Menteş, T. O.</searchLink><br /><searchLink fieldCode="AR" term="%22Locatelli%2C+A%2E%22">Locatelli, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Zając%2C+M%2E%22">Zając, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Wilgocka-Ślęzak%2C+D%2E%22">Wilgocka-Ślęzak, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Dróżdż%2C+P%2E%22">Dróżdż, P.</searchLink><br /><searchLink fieldCode="AR" term="%22Ślęzak%2C+T%2E%22">Ślęzak, T.</searchLink>
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  Data: 2024
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  Data: Magnetic vortices are topological spin structures frequently found in ferromagnets, yet novel to antiferromagnets. By combining experiment and theory, we demonstrate that in a nanostructured antiferromagnetic-ferromagnetic NiO(111)-Fe(110) bilayer, a magnetic vortex is naturally stabilized by magnetostatic interactions in the ferromagnet and is imprinted onto the adjacent antiferromagnet via interface exchange coupling. We use micromagnetic simulations to construct a corresponding phase diagram of the stability of the imprinted antiferromagnetic vortex state. Our in depth analysis reveals that the interplay between interface exchange coupling and the antiferromagnet magnetic anisotropy plays a crucial role in locally reorienting the N\'eel vector out-of-plane in the prototypical in-plane antiferromagnet NiO and thereby stabilizing the vortices in the antiferromagnet.
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      – SubjectFull: Condensed Matter - Materials Science
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