Sabet, S. ; Moradabadi, A. ; Gorji, S. ; Fawey, M. H. ; Hildebrandt, E. ; Radulov, I. ; Wang, D. ; Zhang, H. ; Kübel, C. ; Alff, L. (2019)
Correlation of Interface Structure with Magnetic Exchange in a Hard/Soft Magnetic Model Nanostructure.
In: Physical Review Applied, 11 (5)
doi: 10.1103/PhysRevApplied.11.054078
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Synthesis of hard/soft magnetically exchange-coupled heterostructures is one promising way to design energy-efficient rare-earth-free artificial magnetic materials for application as permanent magnets and in spintronics. As a model system, we experimentally investigate MnGa/FeCo bilayers and simulate their physical behavior in a combined density functional theory and micromagnetic approach. Using high-quality L10−Mn1.5Ga thin films with bulklike magnetic properties, we show that optimal coherent exchange coupling is obtained below a critical soft magnetic layer thickness that depends on the interface structure and composition. In particular, for atomically smooth and matched epitaxial interfaces of L10−Mn1.5Ga to a Co-terminated and Co-rich FeCo layer, coherent exchange coupling is observed for FeCo thicknesses below 2 nm. In optimized bilayers, the magnetic coercivity of MnGa (approximately 6 kOe) can be fully conserved while the overall saturation magnetization is increased beyond 1000emu/cm3. Our model correlates interface structure and magnetic exchange coupling, providing guidelines to engineer high-performance exchange-coupled heterostructures for permanent magnets or spintronic devices.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2019 |
| Autor(en): | Sabet, S. ; Moradabadi, A. ; Gorji, S. ; Fawey, M. H. ; Hildebrandt, E. ; Radulov, I. ; Wang, D. ; Zhang, H. ; Kübel, C. ; Alff, L. |
| Art des Eintrags: | Bibliographie |
| Titel: | Correlation of Interface Structure with Magnetic Exchange in a Hard/Soft Magnetic Model Nanostructure |
| Sprache: | Englisch |
| Publikationsjahr: | 29 Mai 2019 |
| Verlag: | American Physical Society (APS) |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Physical Review Applied |
| Jahrgang/Volume einer Zeitschrift: | 11 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1103/PhysRevApplied.11.054078 |
| URL / URN: | https://doi.org/10.1103/PhysRevApplied.11.054078 |
| Kurzbeschreibung (Abstract): | Synthesis of hard/soft magnetically exchange-coupled heterostructures is one promising way to design energy-efficient rare-earth-free artificial magnetic materials for application as permanent magnets and in spintronics. As a model system, we experimentally investigate MnGa/FeCo bilayers and simulate their physical behavior in a combined density functional theory and micromagnetic approach. Using high-quality L10−Mn1.5Ga thin films with bulklike magnetic properties, we show that optimal coherent exchange coupling is obtained below a critical soft magnetic layer thickness that depends on the interface structure and composition. In particular, for atomically smooth and matched epitaxial interfaces of L10−Mn1.5Ga to a Co-terminated and Co-rich FeCo layer, coherent exchange coupling is observed for FeCo thicknesses below 2 nm. In optimized bilayers, the magnetic coercivity of MnGa (approximately 6 kOe) can be fully conserved while the overall saturation magnetization is increased beyond 1000emu/cm3. Our model correlates interface structure and magnetic exchange coupling, providing guidelines to engineer high-performance exchange-coupled heterostructures for permanent magnets or spintronic devices. |
| 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 > In-Situ Elektronenmikroskopie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Theorie magnetischer Materialien |
| Hinterlegungsdatum: | 30 Mär 2020 09:13 |
| Letzte Änderung: | 13 Jan 2024 16:57 |
| PPN: | |
| Projekte: | The authors acknowledge the LOEWE project RESPONSE funded by the Ministry of Higher Education, Research and the Arts (HMWK) and the high-performance computer center of Hessen (Lichtenberg). |
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