Emergence of coercivity in Sm(Fe                         0.8                         Co                         0.2                         )                         12                          thin films via eutectic alloy grain boundary infiltration

D. Ogawa; X. D. Xu; Y. K. Takahashi; T. Ohkubo; S. Hirosawa; K. Hono

doi:10.1016/j.scriptamat.2019.02.001

Emergence of coercivity in Sm(Fe _0.8 Co _0.2 ) ₁₂ thin films via eutectic alloy grain boundary infiltration

D. Ogawa, X. D. Xu, Y. K. Takahashi^*, T. Ohkubo, S. Hirosawa, K. Hono

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

The anisotropy field of the ThMn ₁₂ -type Sm(Fe _0.8 Co _0.2 ) ₁₂ compound is high. However, there is an absence of reports on sufficiently high coercivity for anisotropic permanent magnet application. In this study, we employed the grain boundary diffusion process to anisotropic Sm(Fe _0.8 Co _0.2 ) ₁₂ thin films. As-grown (001)-textured nanocrystalline film exhibit a coercivity of only 0.4 T. However, the grain boundary diffusion process via a Cu-Ga capping layer increases coercivity to 0.8 T. The coercivity exhibits relatively low temperature dependence when compared to that of Nd-Fe-B magnets.

Original language	English
Pages (from-to)	140-144
Number of pages	5
Journal	Scripta Materialia
Volume	164
DOIs	https://doi.org/10.1016/j.scriptamat.2019.02.001
Publication status	Published - 2019 Apr 15
Externally published	Yes

Keywords

Coercivity
Grain boundary diffusion process
Permanent magnet
SmFe
ThMn structure

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/j.scriptamat.2019.02.001

Cite this

Ogawa, D., Xu, X. D., Takahashi, Y. K., Ohkubo, T., Hirosawa, S., & Hono, K. (2019). Emergence of coercivity in Sm(Fe _0.8 Co _0.2 ) ₁₂ thin films via eutectic alloy grain boundary infiltration Scripta Materialia, 164, 140-144. https://doi.org/10.1016/j.scriptamat.2019.02.001

Emergence of coercivity in Sm(Fe _0.8 Co _0.2 ) ₁₂ thin films via eutectic alloy grain boundary infiltration . / Ogawa, D.; Xu, X. D.; Takahashi, Y. K. et al.
In: Scripta Materialia, Vol. 164, 15.04.2019, p. 140-144.

Research output: Contribution to journal › Article › peer-review

Ogawa, D, Xu, XD, Takahashi, YK, Ohkubo, T, Hirosawa, S & Hono, K 2019, ' Emergence of coercivity in Sm(Fe _0.8 Co _0.2 ) ₁₂ thin films via eutectic alloy grain boundary infiltration ', Scripta Materialia, vol. 164, pp. 140-144. https://doi.org/10.1016/j.scriptamat.2019.02.001

Ogawa D, Xu XD, Takahashi YK, Ohkubo T, Hirosawa S, Hono K. Emergence of coercivity in Sm(Fe _0.8 Co _0.2 ) ₁₂ thin films via eutectic alloy grain boundary infiltration Scripta Materialia. 2019 Apr 15;164:140-144. doi: 10.1016/j.scriptamat.2019.02.001

Ogawa, D. ; Xu, X. D. ; Takahashi, Y. K. et al. / Emergence of coercivity in Sm(Fe _0.8 Co _0.2 ) ₁₂ thin films via eutectic alloy grain boundary infiltration In: Scripta Materialia. 2019 ; Vol. 164. pp. 140-144.

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abstract = " The anisotropy field of the ThMn 12 -type Sm(Fe 0.8 Co 0.2 ) 12 compound is high. However, there is an absence of reports on sufficiently high coercivity for anisotropic permanent magnet application. In this study, we employed the grain boundary diffusion process to anisotropic Sm(Fe 0.8 Co 0.2 ) 12 thin films. As-grown (001)-textured nanocrystalline film exhibit a coercivity of only 0.4 T. However, the grain boundary diffusion process via a Cu-Ga capping layer increases coercivity to 0.8 T. The coercivity exhibits relatively low temperature dependence when compared to that of Nd-Fe-B magnets. ",

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