Herper, Heike C. ; Skokov, Konstantin P. ; Ener, Semih ; Thunström, Patrik ; Diop, Léopold V.B. ; Gutfleisch, Oliver ; Eriksson, Olle (2023)
Magnetic properties of NdFe11Ti and YFe11Ti, from experiment and theory.
In: Acta Materialia, 242
doi: 10.1016/j.actamat.2022.118473
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
NdFeTi and YFeTi serve as prototypes for rare-earth (RE) lean or REfree magnets with the ThMn-type structure. Although NdFeTi has been studied for a long time the origin of its complex magnetism at low temperature is so far not well-understood. We present a comprehensive theoretical and experimental study of the magnetic properties of NdFeTi and RE-free YFeTi to elucidate the influence of the 4 electrons. The partially localized electrons of Nd are the driving force behind the complex behavior of the magnetocrystalline anisotropy which changes from cone to uniaxial above 170 dK. The spontaneous magnetization and the five leading anisotropy constants were determined from high-quality single crystal samples over a wide temperature range using field dependencies of magnetization measured along the principle crystallographic directions. The experimental data are compared with density functional theory combined with a Hartree-Fock correction (+U) and an approximate dynamical mean-field theory.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Herper, Heike C. ; Skokov, Konstantin P. ; Ener, Semih ; Thunström, Patrik ; Diop, Léopold V.B. ; Gutfleisch, Oliver ; Eriksson, Olle |
| Art des Eintrags: | Bibliographie |
| Titel: | Magnetic properties of NdFe11Ti and YFe11Ti, from experiment and theory |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Januar 2023 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 242 |
| DOI: | 10.1016/j.actamat.2022.118473 |
| Kurzbeschreibung (Abstract): | NdFeTi and YFeTi serve as prototypes for rare-earth (RE) lean or REfree magnets with the ThMn-type structure. Although NdFeTi has been studied for a long time the origin of its complex magnetism at low temperature is so far not well-understood. We present a comprehensive theoretical and experimental study of the magnetic properties of NdFeTi and RE-free YFeTi to elucidate the influence of the 4 electrons. The partially localized electrons of Nd are the driving force behind the complex behavior of the magnetocrystalline anisotropy which changes from cone to uniaxial above 170 dK. The spontaneous magnetization and the five leading anisotropy constants were determined from high-quality single crystal samples over a wide temperature range using field dependencies of magnetization measured along the principle crystallographic directions. The experimental data are compared with density functional theory combined with a Hartree-Fock correction (+U) and an approximate dynamical mean-field theory. |
| Freie Schlagworte: | Permanent magnets, Rare-earths, Anisotropy, Magnetism, DFT, DMFT |
| Zusätzliche Informationen: | Artikel-ID: 118473 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien |
| Hinterlegungsdatum: | 13 Dez 2022 06:33 |
| Letzte Änderung: | 13 Dez 2022 09:03 |
| PPN: | 50252474X |
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