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, 8 (3), pp. 89-96. Taylor & Francis, ISSN 2166-3831,
DOI: 10.25534/tuprints-00011579,
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Item Type: | Article |
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Origin: | Secondary publication via sponsored Golden Open Access |
Title: | Anisotropic exchange in Nd–Fe–B permanent magnets |
Language: | English |
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. |
Journal or Publication Title: | Materials Research Letters |
Volume of the journal: | 8 |
Issue Number: | 3 |
Place of Publication: | Darmstadt |
Publisher: | Taylor & Francis |
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: | 05 Apr 2023 09:47 |
DOI: | 10.25534/tuprints-00011579 |
URL / URN: | https://doi.org/10.1080/21663831.2019.1702116 |
URN: | urn:nbn:de:tuda-tuprints-115791 |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/11579 |
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