Microstructure and domain structures of Sm0.56GdxDy0.44-x(Co0.68Fe 0.22Cu0.08Zr0.02)7.22 magnets with low temperature coefficients

Jinbo Yang; Changguo Ji; Weihua Mao; Yingchang Yang; Hai Xu; Baoshan Han; Wei Li; Xiaojun Yu

doi:10.1063/1.370846

Microstructure and domain structures of Sm_0.56Gd_xDy_0.44-x(Co_0.68Fe _0.22Cu_0.08Zr_0.02)7.22 magnets with low temperature coefficients

Jinbo Yang, Changguo Ji, Weihua Mao, Yingchang Yang, Hai Xu, Baoshan Han, Wei Li, Xiaojun Yu

Radiation Oncology

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Abstract

The microstructure and domain structures of high performance temperature-compensated sintered magnets with composition of Sm_0.56Gd_xDy_0.44-x(TM)_7.22 (TM=Co_0.68Fe_0.22Cu_0.08Zr_0.02) _7.22 (0.0 ≤x≤0.4) have been investigated by using electron microscopy and magnetic force microscopy. Both microstructure and magnetic properties of these magnets show a significant dependence on the content of heavy rare earth Gd and Dy. The intrinsic coercive force increases significantly with increasing Gd content. It is found that there are two different types of grains in the magnets, which show different domain structures. The larger magnetocrystalline anisotropy, larger cell size, and coarser grain boundary region give rise to a higher coercivity in the Gd-rich magnets.

Original language	English (US)
Pages (from-to)	1053-1056
Number of pages	4
Journal	Journal of Applied Physics
Volume	86
Issue number	2
DOIs	https://doi.org/10.1063/1.370846
State	Published - Jul 15 1999

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Microstructure and domain structures of Sm0.56GdxDy0.44-x(Co0.68Fe 0.22Cu0.08Zr0.02)7.22 magnets with low temperature coefficients",

abstract = "The microstructure and domain structures of high performance temperature-compensated sintered magnets with composition of Sm0.56GdxDy0.44-x(TM)7.22 (TM=Co0.68Fe0.22Cu0.08Zr0.02) 7.22 (0.0 ≤x≤0.4) have been investigated by using electron microscopy and magnetic force microscopy. Both microstructure and magnetic properties of these magnets show a significant dependence on the content of heavy rare earth Gd and Dy. The intrinsic coercive force increases significantly with increasing Gd content. It is found that there are two different types of grains in the magnets, which show different domain structures. The larger magnetocrystalline anisotropy, larger cell size, and coarser grain boundary region give rise to a higher coercivity in the Gd-rich magnets.",

author = "Jinbo Yang and Changguo Ji and Weihua Mao and Yingchang Yang and Hai Xu and Baoshan Han and Wei Li and Xiaojun Yu",

year = "1999",

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T1 - Microstructure and domain structures of Sm0.56GdxDy0.44-x(Co0.68Fe 0.22Cu0.08Zr0.02)7.22 magnets with low temperature coefficients

AU - Yang, Jinbo

AU - Ji, Changguo

AU - Mao, Weihua

AU - Yang, Yingchang

AU - Xu, Hai

AU - Han, Baoshan

AU - Li, Wei

AU - Yu, Xiaojun

PY - 1999/7/15

Y1 - 1999/7/15

N2 - The microstructure and domain structures of high performance temperature-compensated sintered magnets with composition of Sm0.56GdxDy0.44-x(TM)7.22 (TM=Co0.68Fe0.22Cu0.08Zr0.02) 7.22 (0.0 ≤x≤0.4) have been investigated by using electron microscopy and magnetic force microscopy. Both microstructure and magnetic properties of these magnets show a significant dependence on the content of heavy rare earth Gd and Dy. The intrinsic coercive force increases significantly with increasing Gd content. It is found that there are two different types of grains in the magnets, which show different domain structures. The larger magnetocrystalline anisotropy, larger cell size, and coarser grain boundary region give rise to a higher coercivity in the Gd-rich magnets.

AB - The microstructure and domain structures of high performance temperature-compensated sintered magnets with composition of Sm0.56GdxDy0.44-x(TM)7.22 (TM=Co0.68Fe0.22Cu0.08Zr0.02) 7.22 (0.0 ≤x≤0.4) have been investigated by using electron microscopy and magnetic force microscopy. Both microstructure and magnetic properties of these magnets show a significant dependence on the content of heavy rare earth Gd and Dy. The intrinsic coercive force increases significantly with increasing Gd content. It is found that there are two different types of grains in the magnets, which show different domain structures. The larger magnetocrystalline anisotropy, larger cell size, and coarser grain boundary region give rise to a higher coercivity in the Gd-rich magnets.

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Microstructure and domain structures of Sm_0.56Gd_xDy_0.44-x(Co_0.68Fe _0.22Cu_0.08Zr_0.02)7.22 magnets with low temperature coefficients

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