Sabet, S. ; Moradabadi, A. ; Gorji, S. ; Yi, M. ; Gong, Q. ; Fawey, M. H. ; Hildebrandt, E. ; Wang, D. ; Zhang, H. ; Xu, Bai-Xiang ; Kübel, C. ; Alff, L. (2018)
Impact of interface structure on magnetic exchange coupling in MnBi/FexCo1−x bilayers.
In: Physical Review B, 98 (17)
doi: 10.1103/PhysRevB.98.174440
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Magnetic exchange coupling behavior was investigated in MnBi/FeCo bilayer system at the hard/soft magnetic interface. We performed a combined study of cross-sectional high resolution transmission electron microscopy (HR-TEM), DFT calculations, and micromagnetic simulations to elucidate effect of interface structure on exchange coupling. Exchange spring MnBi/FexCo1−x(x=0.65 and 0.35) bilayers with various thicknesses of the soft magnetic layer were deposited in a dc magnetron sputtering unit from alloy targets. According to magnetic measurements, using a Co-rich layer leads to a more coherent exchange coupling with optimum soft layer thickness of about 1 nm. Our DFT calculations predicted formation of a polycrystalline FeCo layer with coexisting crystalline and disordered (110) phases. The indexed FFTs from HR-TEM images confirmed a crystalline FeCo(110) layer, with slight misorientation in some areas, and a disordered region close to the interface which deteriorates interface exchange coupling. Moreover, our micromagnetic simulations showed how the thickness of the FeCo layer and the interface roughness both control the effectiveness of exchange coupling in MnBi/FeCo bilayer.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Sabet, S. ; Moradabadi, A. ; Gorji, S. ; Yi, M. ; Gong, Q. ; Fawey, M. H. ; Hildebrandt, E. ; Wang, D. ; Zhang, H. ; Xu, Bai-Xiang ; Kübel, C. ; Alff, L. |
| Art des Eintrags: | Bibliographie |
| Titel: | Impact of interface structure on magnetic exchange coupling in MnBi/FexCo1−x bilayers |
| Sprache: | Englisch |
| Publikationsjahr: | 1 November 2018 |
| Verlag: | American Physical Society |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review B |
| Jahrgang/Volume einer Zeitschrift: | 98 |
| (Heft-)Nummer: | 17 |
| DOI: | 10.1103/PhysRevB.98.174440 |
| URL / URN: | https://doi.org/10.1103/PhysRevB.98.174440 |
| Kurzbeschreibung (Abstract): | Magnetic exchange coupling behavior was investigated in MnBi/FeCo bilayer system at the hard/soft magnetic interface. We performed a combined study of cross-sectional high resolution transmission electron microscopy (HR-TEM), DFT calculations, and micromagnetic simulations to elucidate effect of interface structure on exchange coupling. Exchange spring MnBi/FexCo1−x(x=0.65 and 0.35) bilayers with various thicknesses of the soft magnetic layer were deposited in a dc magnetron sputtering unit from alloy targets. According to magnetic measurements, using a Co-rich layer leads to a more coherent exchange coupling with optimum soft layer thickness of about 1 nm. Our DFT calculations predicted formation of a polycrystalline FeCo layer with coexisting crystalline and disordered (110) phases. The indexed FFTs from HR-TEM images confirmed a crystalline FeCo(110) layer, with slight misorientation in some areas, and a disordered region close to the interface which deteriorates interface exchange coupling. Moreover, our micromagnetic simulations showed how the thickness of the FeCo layer and the interface roughness both control the effectiveness of exchange coupling in MnBi/FeCo bilayer. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Dünne Schichten 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Theorie magnetischer Materialien |
| Hinterlegungsdatum: | 17 Jan 2019 08:48 |
| Letzte Änderung: | 26 Jan 2024 09:23 |
| PPN: | |
| Sponsoren: | The authors thank the LOEWE project RESPONSE funded by the Ministry of Higher Education, Research and the Arts (HMWK) of the state of Hessen, Germany., We also acknowl- edge the computing time by the high performance computer center of Hessen (Lichtenberg), and K. Albe from Technische Universität Darmstadt. |
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