Magnetic properties of Sm-Co and Sm-Co/M (M=Co, Fe) exchange-spring films

Yoshihiro Yamazaki; Kazuhide Takano; Hitoshi Takamura; Satoshi Sugimoto; Motofumi Homma; Masuo Okada

doi:10.2497/jjspm.44.827

Magnetic properties of Sm-Co and Sm-Co/M (M=Co, Fe) exchange-spring films

Yoshihiro Yamazaki, Kazuhide Takano, Hitoshi Takamura, Satoshi Sugimoto, Motofumi Homma, Masuo Okada

ENG - Materials Science

Tohoku University

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

Abstract

The structure and magnetic properties of Sm-Co films and Sm-Co/M (M=Co, Fe) multilayered films prepared by rf sputtering were investigated. The results show that a hard magnetic phase as Sm₂Co₁₇ and SmCo₅ phase and a soft magnetic phase were formed by annealing Sm-Co and Sm-Co/M films. Sm₁₆Co₈₄ film annealed for 1.8 ks at 773 K had the springback ratio of [Mr′-M(H)]/[Mr-M(H)]=0.72. This film was found to behave as a exchange-spring magnet composed of a hard magnetic phase and a soft magnetic phase. Sm₁₆Co₈₄/Fe multilayered film was also found to be a exchange-spring magnet.

Original language	English
Pages (from-to)	827-832
Number of pages	6
Journal	Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume	44
Issue number	9
DOIs	https://doi.org/10.2497/jjspm.44.827
Publication status	Published - 1997 Sept

Keywords

Exchange coupling
Exchange-spring magnet
Film magnet
Reversible magnetization
Sm-Co system

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title = "Magnetic properties of Sm-Co and Sm-Co/M (M=Co, Fe) exchange-spring films",

abstract = "The structure and magnetic properties of Sm-Co films and Sm-Co/M (M=Co, Fe) multilayered films prepared by rf sputtering were investigated. The results show that a hard magnetic phase as Sm2Co17 and SmCo5 phase and a soft magnetic phase were formed by annealing Sm-Co and Sm-Co/M films. Sm16Co84 film annealed for 1.8 ks at 773 K had the springback ratio of [Mr′-M(H)]/[Mr-M(H)]=0.72. This film was found to behave as a exchange-spring magnet composed of a hard magnetic phase and a soft magnetic phase. Sm16Co84/Fe multilayered film was also found to be a exchange-spring magnet.",

keywords = "Exchange coupling, Exchange-spring magnet, Film magnet, Reversible magnetization, Sm-Co system",

author = "Yoshihiro Yamazaki and Kazuhide Takano and Hitoshi Takamura and Satoshi Sugimoto and Motofumi Homma and Masuo Okada",

year = "1997",

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T1 - Magnetic properties of Sm-Co and Sm-Co/M (M=Co, Fe) exchange-spring films

AU - Yamazaki, Yoshihiro

AU - Takano, Kazuhide

AU - Takamura, Hitoshi

AU - Sugimoto, Satoshi

AU - Homma, Motofumi

AU - Okada, Masuo

PY - 1997/9

Y1 - 1997/9

N2 - The structure and magnetic properties of Sm-Co films and Sm-Co/M (M=Co, Fe) multilayered films prepared by rf sputtering were investigated. The results show that a hard magnetic phase as Sm2Co17 and SmCo5 phase and a soft magnetic phase were formed by annealing Sm-Co and Sm-Co/M films. Sm16Co84 film annealed for 1.8 ks at 773 K had the springback ratio of [Mr′-M(H)]/[Mr-M(H)]=0.72. This film was found to behave as a exchange-spring magnet composed of a hard magnetic phase and a soft magnetic phase. Sm16Co84/Fe multilayered film was also found to be a exchange-spring magnet.

AB - The structure and magnetic properties of Sm-Co films and Sm-Co/M (M=Co, Fe) multilayered films prepared by rf sputtering were investigated. The results show that a hard magnetic phase as Sm2Co17 and SmCo5 phase and a soft magnetic phase were formed by annealing Sm-Co and Sm-Co/M films. Sm16Co84 film annealed for 1.8 ks at 773 K had the springback ratio of [Mr′-M(H)]/[Mr-M(H)]=0.72. This film was found to behave as a exchange-spring magnet composed of a hard magnetic phase and a soft magnetic phase. Sm16Co84/Fe multilayered film was also found to be a exchange-spring magnet.

KW - Exchange coupling

KW - Exchange-spring magnet

KW - Film magnet

KW - Reversible magnetization

KW - Sm-Co system

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ER -

Magnetic properties of Sm-Co and Sm-Co/M (M=Co, Fe) exchange-spring films

Abstract

Keywords

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