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

ENG - Electrical Engineering

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

55 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 1

Keywords

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

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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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",

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language = "English",

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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

PY - 2005/10/1

Y1 - 2005/10/1

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

Abstract

Keywords

ASJC Scopus subject areas

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