Development of FeCo-based thin films for gigahertz applications

Eunji Yu; Jong Sik Shim; Inyoung Kim; Jongryoul Kim; Suk Hee Han; Hi Jung Kim; Ki Hyeon Kim; Masahiro Yamaguchi

doi:10.1109/TMAG.2005.854667

Development of FeCo-based thin films for gigahertz applications

Eunji Yu, Jong Sik Shim, Inyoung Kim, Jongryoul Kim, Suk Hee Han, Hi Jung Kim, Ki Hyeon Kim, Masahiro Yamaguchi

New Industry Creation Hatchery Center (NICHe)

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

60 Citations (Scopus)

Abstract

For improving high-frequency characteristics and soft magnetic properties of (Fe₇ Co₃)B-based thin films, the effects of Ni addition and an oblique deposition method on the microstructures have been examined. The Ni addition to (Fe₇Co₃)B films was found to enhance B segregation on grain boundaries, which resulted in the formation of a well-defined columnar structure and the increase of film resistivity. Utilizing the columnar structure, large in-plane anisotropy was induced by an oblique deposition method which enabled the control of the inclination angle of the columns. As a result, the ferromagnetic resonance of (Fe₇Co ₃)₇₁Ni₇B₂₂ thin films reached 6.2 GHz.

Original language	English
Pages (from-to)	3259-3261
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	41
Issue number	10
DOIs	https://doi.org/10.1109/TMAG.2005.854667
Publication status	Published - 2005 Oct

Keywords

High-frequency characteristics
Microstructural analysis
Oblique deposition method
Soft magnetic thin film

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title = "Development of FeCo-based thin films for gigahertz applications",

abstract = "For improving high-frequency characteristics and soft magnetic properties of (Fe7 Co3)B-based thin films, the effects of Ni addition and an oblique deposition method on the microstructures have been examined. The Ni addition to (Fe7Co3)B films was found to enhance B segregation on grain boundaries, which resulted in the formation of a well-defined columnar structure and the increase of film resistivity. Utilizing the columnar structure, large in-plane anisotropy was induced by an oblique deposition method which enabled the control of the inclination angle of the columns. As a result, the ferromagnetic resonance of (Fe7Co 3)71Ni7B22 thin films reached 6.2 GHz.",

keywords = "High-frequency characteristics, Microstructural analysis, Oblique deposition method, Soft magnetic thin film",

author = "Eunji Yu and Shim, {Jong Sik} and Inyoung Kim and Jongryoul Kim and Han, {Suk Hee} and Kim, {Hi Jung} and Kim, {Ki Hyeon} and Masahiro Yamaguchi",

note = "Funding Information: This work was supported by the Korea Research Foundation.",

year = "2005",

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T1 - Development of FeCo-based thin films for gigahertz applications

AU - Yu, Eunji

AU - Shim, Jong Sik

AU - Kim, Inyoung

AU - Kim, Jongryoul

AU - Han, Suk Hee

AU - Kim, Hi Jung

AU - Kim, Ki Hyeon

AU - Yamaguchi, Masahiro

N1 - Funding Information: This work was supported by the Korea Research Foundation.

PY - 2005/10

Y1 - 2005/10

N2 - For improving high-frequency characteristics and soft magnetic properties of (Fe7 Co3)B-based thin films, the effects of Ni addition and an oblique deposition method on the microstructures have been examined. The Ni addition to (Fe7Co3)B films was found to enhance B segregation on grain boundaries, which resulted in the formation of a well-defined columnar structure and the increase of film resistivity. Utilizing the columnar structure, large in-plane anisotropy was induced by an oblique deposition method which enabled the control of the inclination angle of the columns. As a result, the ferromagnetic resonance of (Fe7Co 3)71Ni7B22 thin films reached 6.2 GHz.

AB - For improving high-frequency characteristics and soft magnetic properties of (Fe7 Co3)B-based thin films, the effects of Ni addition and an oblique deposition method on the microstructures have been examined. The Ni addition to (Fe7Co3)B films was found to enhance B segregation on grain boundaries, which resulted in the formation of a well-defined columnar structure and the increase of film resistivity. Utilizing the columnar structure, large in-plane anisotropy was induced by an oblique deposition method which enabled the control of the inclination angle of the columns. As a result, the ferromagnetic resonance of (Fe7Co 3)71Ni7B22 thin films reached 6.2 GHz.

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KW - Microstructural analysis

KW - Oblique deposition method

KW - Soft magnetic thin film

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Development of FeCo-based thin films for gigahertz applications

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Keywords

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