Microstructures and coercivities of SmCox and Sm(Co,Cu)5 films prepared by magnetron sputtering

J. Zhang; Y. K. Takahashi; R. Gopalan; K. Hono

doi:10.1016/j.jmmm.2006.07.017

Microstructures and coercivities of SmCo_x and Sm(Co,Cu)₅ films prepared by magnetron sputtering

J. Zhang, Y. K. Takahashi, R. Gopalan, K. Hono^*

^*この研究の対応する著者

研究成果: Article › 査読

33 被引用数 (Scopus)

抄録

We have investigated the influence of composition and annealing conditions on the magnetic properties and microstructural features of SmCo_x films that were prepared by sputtering and subsequent annealing. A huge in-plane coercivity of 5.6 T was obtained from an optimally annealed Sm-Co film, which was attributed to the nanometer sized polycrystalline microstructure of the highly anisotropic SmCo₅ phase. Although a high density of planar defects were observed in the films that were annealed at high temperatures, they did not act as strong pinning sites for domain wall motion. The effect of Cu on [SmCo_4.5(9 nm)/Cu(xnm)]₁₀ multilayer thin films was also studied. An appropriate Cu content increased the coercivity.

本文言語	English
ページ（範囲）	1-7
ページ数	7
ジャーナル	Journal of Magnetism and Magnetic Materials
巻	310
号	1
DOI	https://doi.org/10.1016/j.jmmm.2006.07.017
出版ステータス	Published - 2007 3月
外部発表	はい

ASJC Scopus subject areas

電子材料、光学材料、および磁性材料
凝縮系物理学

文献へのアクセス

10.1016/j.jmmm.2006.07.017

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引用スタイル

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title = "Microstructures and coercivities of SmCox and Sm(Co,Cu)5 films prepared by magnetron sputtering",

abstract = "We have investigated the influence of composition and annealing conditions on the magnetic properties and microstructural features of SmCox films that were prepared by sputtering and subsequent annealing. A huge in-plane coercivity of 5.6 T was obtained from an optimally annealed Sm-Co film, which was attributed to the nanometer sized polycrystalline microstructure of the highly anisotropic SmCo5 phase. Although a high density of planar defects were observed in the films that were annealed at high temperatures, they did not act as strong pinning sites for domain wall motion. The effect of Cu on [SmCo4.5(9 nm)/Cu(xnm)]10 multilayer thin films was also studied. An appropriate Cu content increased the coercivity.",

keywords = "Huge coercivity, Microstructure, Phase transition, Sm-Co film",

author = "J. Zhang and Takahashi, {Y. K.} and R. Gopalan and K. Hono",

note = "Funding Information: This work was in part supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research (B), 17360346, 2005. JZ acknowledges the Japan Science Promotion Society for JSPS fellowships. The authors thank Ms. T.O. Seki and Dr. C.Y. You for their help.",

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AU - Zhang, J.

AU - Takahashi, Y. K.

AU - Gopalan, R.

AU - Hono, K.

N1 - Funding Information: This work was in part supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research (B), 17360346, 2005. JZ acknowledges the Japan Science Promotion Society for JSPS fellowships. The authors thank Ms. T.O. Seki and Dr. C.Y. You for their help.

PY - 2007/3

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N2 - We have investigated the influence of composition and annealing conditions on the magnetic properties and microstructural features of SmCox films that were prepared by sputtering and subsequent annealing. A huge in-plane coercivity of 5.6 T was obtained from an optimally annealed Sm-Co film, which was attributed to the nanometer sized polycrystalline microstructure of the highly anisotropic SmCo5 phase. Although a high density of planar defects were observed in the films that were annealed at high temperatures, they did not act as strong pinning sites for domain wall motion. The effect of Cu on [SmCo4.5(9 nm)/Cu(xnm)]10 multilayer thin films was also studied. An appropriate Cu content increased the coercivity.

AB - We have investigated the influence of composition and annealing conditions on the magnetic properties and microstructural features of SmCox films that were prepared by sputtering and subsequent annealing. A huge in-plane coercivity of 5.6 T was obtained from an optimally annealed Sm-Co film, which was attributed to the nanometer sized polycrystalline microstructure of the highly anisotropic SmCo5 phase. Although a high density of planar defects were observed in the films that were annealed at high temperatures, they did not act as strong pinning sites for domain wall motion. The effect of Cu on [SmCo4.5(9 nm)/Cu(xnm)]10 multilayer thin films was also studied. An appropriate Cu content increased the coercivity.

KW - Huge coercivity

KW - Microstructure

KW - Phase transition

KW - Sm-Co film

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