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
Article, Secondary publication
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Anisotropic exchange in Nd Fe B permanent magnets.pdf Copyright Information: CC BY-NC 4.0 International - Creative Commons, Attribution NonCommercial. Download (2MB) | Preview |
| Item Type: | Article |
|---|---|
| Type of entry: | Secondary publication |
| Title: | Anisotropic exchange in Nd–Fe–B permanent magnets |
| Language: | English |
| Date: | 24 March 2020 |
| Place of Publication: | Darmstadt |
| Year of primary publication: | 2020 |
| Publisher: | Taylor & Francis |
| Journal or Publication Title: | Materials Research Letters |
| Volume of the journal: | 8 |
| Issue Number: | 3 |
| DOI: | 10.25534/tuprints-00011579 |
| URL / URN: | https://doi.org/10.1080/21663831.2019.1702116 |
| Origin: | Secondary publication via sponsored Golden Open Access |
| 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. |
| URN: | urn:nbn:de:tuda-tuprints-115791 |
| Classification DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau |
| Divisions: | 11 Department of Materials and Earth Sciences > Material Science > Mechanics of functional Materials DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue |
| Date Deposited: | 24 Mar 2020 13:15 |
| Last Modified: | 19 Sep 2023 18:01 |
| URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/11579 |
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