Koch, David ; Beckmann, Benedikt ; Fortunato, Nuno M. ; Miroshkina, Olga N. ; Gruner, Markus E. ; Zhang, Hongbin ; Gutfleisch, Oliver ; Donner, Wolfgang (2022)
Chemical long range ordering in all-d-metal Heusler alloys.
In: Journal of Applied Physics, 131 (7)
doi: 10.1063/5.0079952
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Chemical ordering in NiMn-based Heusler alloys with magnetostructural phase transition is crucial for understanding the physics of the phase transition. In the new field of all-d-metal Ni(Co)MnTi Heusler alloys, the experimental determination of chemical order is challenging due to the low difference in scattering power of the different elements. Here, we report a combined approach of neutron and x-ray diffraction for an analysis of chemical order in Ni(Co)MnTi alloys and show that no Heusler-typical L21 order between Ti and Mn is present. Furthermore, Co and Ni atoms do not exhibit order among them; however, the phase transition of Co containing samples can be shifted significantly by changing the degree of B2 order with proper heat treatment. Using first-principles calculations, we reveal how the structural and magnetic sub-systems depend on the degree of B2 disorder.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Koch, David ; Beckmann, Benedikt ; Fortunato, Nuno M. ; Miroshkina, Olga N. ; Gruner, Markus E. ; Zhang, Hongbin ; Gutfleisch, Oliver ; Donner, Wolfgang |
| Art des Eintrags: | Bibliographie |
| Titel: | Chemical long range ordering in all-d-metal Heusler alloys |
| Sprache: | Englisch |
| Publikationsjahr: | 17 Februar 2022 |
| Verlag: | AIP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 131 |
| (Heft-)Nummer: | 7 |
| DOI: | 10.1063/5.0079952 |
| Kurzbeschreibung (Abstract): | Chemical ordering in NiMn-based Heusler alloys with magnetostructural phase transition is crucial for understanding the physics of the phase transition. In the new field of all-d-metal Ni(Co)MnTi Heusler alloys, the experimental determination of chemical order is challenging due to the low difference in scattering power of the different elements. Here, we report a combined approach of neutron and x-ray diffraction for an analysis of chemical order in Ni(Co)MnTi alloys and show that no Heusler-typical L21 order between Ti and Mn is present. Furthermore, Co and Ni atoms do not exhibit order among them; however, the phase transition of Co containing samples can be shifted significantly by changing the degree of B2 order with proper heat treatment. Using first-principles calculations, we reveal how the structural and magnetic sub-systems depend on the degree of B2 disorder. |
| Freie Schlagworte: | Phase transitions, Magnetic fields, Crystal structure, Alloys, Annealing, Neutron scattering, Powder diffraction, Smart materials, X-ray diffraction |
| Zusätzliche Informationen: | Paper No. 073903 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Strukturforschung 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Theorie magnetischer Materialien |
| Hinterlegungsdatum: | 10 Aug 2022 07:16 |
| Letzte Änderung: | 02 Jun 2023 11:06 |
| PPN: | 498047008 |
| Export: | |
| Suche nach Titel in: | TUfind oder in Google |
 |
Frage zum Eintrag |
Optionen (nur für Redakteure)
 |
Redaktionelle Details anzeigen |
Drucken
Impressum