Magnetocrystalline anisotropy of interstitially and substitutionally Sn-doped MnBi for high temperature permanent magnet applications

dc.creatorChoi, Minyeong
dc.creatorHong, Yang Ki
dc.creatorWon, Hoyun
dc.creatorYeo, Chang Dong (TTU)
dc.creatorChoi, Byung Chul
dc.creatorPark, Jihoon
dc.creatorLee, Woncheol
dc.date.accessioned2023-11-14T15:53:22Z
dc.date.available2023-11-14T15:53:22Z
dc.date.issued2023
dc.description© 2023 Author(s). cc-by
dc.description.abstractFirst-principles calculations were performed to calculate the electronic structures of low temperature phase (LTP) MnBi (Mn50Bi50) and substitutionally and interstitially Sn-doped MnBi [Mn50Bi25Sn25, (Mn0.5Bi0.5)66.7Sn33.3]. Brillouin function predicts the temperature dependence of saturation magnetization M(T). Sn substitution for Bi in MnBi (Mn50Bi25Sn25) changes the magnetocrystalline anisotropy constant (Ku) from −0.202 MJ/m3 (the in-plane magnetization) for LTP MnBi to 1.711 MJ/m3 (the out-of-plane magnetization). In comparison, the Ku remains negative but slightly decreases to −0.043 MJ/m3 when Sn is interstitially doped in MnBi [(Mn0.5Bi0.5)66.7Sn33.3]. The Curie temperature (TC) decreases from 716 K for LTP Mn50Bi50 to 445 K for Mn50Bi25Sn25 and 285 K for (Mn0.5Bi0.5)66.7Sn33.3. Mn50Bi25Sn25 has a lower magnetic moment of 5.034 μB/f.u. but a higher saturation magnetization of 64.2 emu/g than (Mn0.5Bi0.5)66.7Sn33.3 with a magnetic moment of 6.609 μB/f.u. and a saturation magnetization of 48.2 emu/g because the weight and volume of the substitutionally Sn-doped MnBi are smaller than the interstitially Sn-doped MnBi. The low Curie temperature and magnetization for Sn-doped MnBi are attributed to the high concentration of Sn. Thus, future study needs to focus on low Sn-concentrated MnBi.
dc.identifier.citationChoi, M., Hong, Y.-K., Won, H., Yeo, C.-D., Choi, B.-C., Park, J., & Lee, W.. 2023. Magnetocrystalline anisotropy of interstitially and substitutionally Sn-doped MnBi for high temperature permanent magnet applications. AIP Advances, 13(10). https://doi.org/10.1063/5.0166930
dc.identifier.urihttps://doi.org/10.1063/5.0166930
dc.identifier.urihttps://hdl.handle.net/2346/96687
dc.language.isoeng
dc.titleMagnetocrystalline anisotropy of interstitially and substitutionally Sn-doped MnBi for high temperature permanent magnet applications
dc.typeArticle

Files

Original bundle

Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Main article with TTU Libraries cover page.pdf
Size:
7.11 MB
Format:
Adobe Portable Document Format

Collections