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-00011409
Article, Secondary publication
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| Item Type: | Article |
|---|---|
| Type of entry: | Secondary publication |
| Title: | Anisotropic exchange in Nd–Fe–B permanent magnets |
| Language: | English |
| Date: | 30 January 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-00011409 |
| 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 (Jint) 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. |
| URN: | urn:nbn:de:tuda-tuprints-114090 |
| Classification DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau > 621.3 Elektrotechnik, Elektronik > 600 Technik 600 Technik, Medizin, angewandte Wissenschaften > 621.3 Elektrotechnik, Elektronik > 600 Technik |
| Divisions: | DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue |
| Date Deposited: | 30 Jan 2020 11:22 |
| Last Modified: | 19 Sep 2023 18:01 |
| URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/11409 |
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