Gong, Qihua ; Yi, Min ; Evans, Richard F. L. ; Gutfleisch, Oliver ; Xu, Bai-Xiang (2020)
Anisotropic exchange in Nd–Fe–B permanent magnets.
In: Materials Research Letters, 2020, 8 (3)
doi: 10.25534/tuprints-00011579
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
The exchange is critical for designing high-performance Nd–Fe–B permanent magnets. Here we demonstrate through multiscale simulations that the exchange in Nd–Fe–B magnets, including bulk exchange stiffness (Ae) in Nd2Fe14B phase and interface exchange coupling strength ([Math Processing Error]) between Nd2Fe14B and grain boundary (GB), is strongly anisotropic. Ae is larger along crystallographic a/b axis than along c axis. Even when the GB FexNd1–x has the same composition, Jint
for (100) interface is much higher than that for (001) interface. The discovered anisotropic exchange is shown to have profound influence on the coercivity. These findings enable more freedom in designing Nd–Fe–B magnets by tuning exchange.
Bulk exchange stiffness in Nd2Fe14B and interface exchange coupling strength between Nd2Fe14B and grain boundary are found strongly anisotropic, which have profound influence on the coercivity of Nd–Fe–B magnets.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Gong, Qihua ; Yi, Min ; Evans, Richard F. L. ; Gutfleisch, Oliver ; Xu, Bai-Xiang |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Anisotropic exchange in Nd–Fe–B permanent magnets |
| Sprache: | Englisch |
| Publikationsjahr: | 2020 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2020 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Materials Research Letters |
| Jahrgang/Volume einer Zeitschrift: | 8 |
| (Heft-)Nummer: | 3 |
| DOI: | 10.25534/tuprints-00011579 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/11579 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung aus gefördertem Golden Open Access |
| Kurzbeschreibung (Abstract): | The exchange is critical for designing high-performance Nd–Fe–B permanent magnets. Here we demonstrate through multiscale simulations that the exchange in Nd–Fe–B magnets, including bulk exchange stiffness (Ae) in Nd2Fe14B phase and interface exchange coupling strength ([Math Processing Error]) between Nd2Fe14B and grain boundary (GB), is strongly anisotropic. Ae is larger along crystallographic a/b axis than along c axis. Even when the GB FexNd1–x has the same composition, Jint for (100) interface is much higher than that for (001) interface. The discovered anisotropic exchange is shown to have profound influence on the coercivity. These findings enable more freedom in designing Nd–Fe–B magnets by tuning exchange. Bulk exchange stiffness in Nd2Fe14B and interface exchange coupling strength between Nd2Fe14B and grain boundary are found strongly anisotropic, which have profound influence on the coercivity of Nd–Fe–B magnets. |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-115791 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Mechanik Funktionaler Materialien |
| Hinterlegungsdatum: | 29 Mär 2020 19:57 |
| Letzte Änderung: | 09 Aug 2024 06:56 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Anisotropic exchange in Nd–Fe–B permanent magnets. (deposited 29 Mär 2020 19:57) [Gegenwärtig angezeigt]
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