Crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons

C. C. Hsieh; H. W. Chang; C. W. Chang; Z. H. Guo; C. C. Yang; W. C. Chang

doi:10.1063/1.3061907

Crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons

C. C. Hsieh, H. W. Chang, C. W. Chang, Z. H. Guo, C. C. Yang, W. C. Chang

Department of Physics

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

25 Scopus citations

Abstract

The crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons have been investigated. It was found that SmCo7-x Vx ribbons may crystallize in pure TbCu7 -type structure for x=0.1-0.3 spun at a high wheel speed of 40 m/s. The structure refinement results show that the doping element V prefers to occupy the 2e site of TbCu7 -type structure. Besides, transmission electron microscopy images show that with increasing V content, the grain size was refined from 200-400 nm for x=0.1 to 40-100 nm for x=0.3. As a result, the intrinsic coercivity enhances effectively from 1.9 kOe for SmCo7 ribbon to 11.5 kOe for SmCo6.7 V0.3 ribbon. It is also verified that a slight addition of C to SmCo7-x Vx could further refine the microstructure, resulting in the improvement of the magnetic properties of SmCo7-x Vx ribbons. The optimal magnetic properties of r =58.7 emu/g, Hi c =13.5 kOe, and (BH) max =9.3 MG Oe can be obtained for SmCo6.9 V0.1 C0.1 ribbon.

Original language	English
Article number	07A705
Journal	Journal of Applied Physics
Volume	105
Issue number	7
DOIs	https://doi.org/10.1063/1.3061907
State	Published - 2009

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title = "Crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons",

abstract = "The crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons have been investigated. It was found that SmCo7-x Vx ribbons may crystallize in pure TbCu7 -type structure for x=0.1-0.3 spun at a high wheel speed of 40 m/s. The structure refinement results show that the doping element V prefers to occupy the 2e site of TbCu7 -type structure. Besides, transmission electron microscopy images show that with increasing V content, the grain size was refined from 200-400 nm for x=0.1 to 40-100 nm for x=0.3. As a result, the intrinsic coercivity enhances effectively from 1.9 kOe for SmCo7 ribbon to 11.5 kOe for SmCo6.7 V0.3 ribbon. It is also verified that a slight addition of C to SmCo7-x Vx could further refine the microstructure, resulting in the improvement of the magnetic properties of SmCo7-x Vx ribbons. The optimal magnetic properties of r =58.7 emu/g, Hi c =13.5 kOe, and (BH) max =9.3 MG Oe can be obtained for SmCo6.9 V0.1 C0.1 ribbon.",

author = "Hsieh, {C. C.} and Chang, {H. W.} and Chang, {C. W.} and Guo, {Z. H.} and Yang, {C. C.} and Chang, {W. C.}",

note = "Funding Information: This study was supported by the National Science Council of Taiwan under Grant No. NSC-95-2112-M-194-009-MY3.",

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volume = "105",

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T1 - Crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons

AU - Hsieh, C. C.

AU - Chang, H. W.

AU - Chang, C. W.

AU - Guo, Z. H.

AU - Yang, C. C.

AU - Chang, W. C.

N1 - Funding Information: This study was supported by the National Science Council of Taiwan under Grant No. NSC-95-2112-M-194-009-MY3.

PY - 2009

Y1 - 2009

N2 - The crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons have been investigated. It was found that SmCo7-x Vx ribbons may crystallize in pure TbCu7 -type structure for x=0.1-0.3 spun at a high wheel speed of 40 m/s. The structure refinement results show that the doping element V prefers to occupy the 2e site of TbCu7 -type structure. Besides, transmission electron microscopy images show that with increasing V content, the grain size was refined from 200-400 nm for x=0.1 to 40-100 nm for x=0.3. As a result, the intrinsic coercivity enhances effectively from 1.9 kOe for SmCo7 ribbon to 11.5 kOe for SmCo6.7 V0.3 ribbon. It is also verified that a slight addition of C to SmCo7-x Vx could further refine the microstructure, resulting in the improvement of the magnetic properties of SmCo7-x Vx ribbons. The optimal magnetic properties of r =58.7 emu/g, Hi c =13.5 kOe, and (BH) max =9.3 MG Oe can be obtained for SmCo6.9 V0.1 C0.1 ribbon.

AB - The crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons have been investigated. It was found that SmCo7-x Vx ribbons may crystallize in pure TbCu7 -type structure for x=0.1-0.3 spun at a high wheel speed of 40 m/s. The structure refinement results show that the doping element V prefers to occupy the 2e site of TbCu7 -type structure. Besides, transmission electron microscopy images show that with increasing V content, the grain size was refined from 200-400 nm for x=0.1 to 40-100 nm for x=0.3. As a result, the intrinsic coercivity enhances effectively from 1.9 kOe for SmCo7 ribbon to 11.5 kOe for SmCo6.7 V0.3 ribbon. It is also verified that a slight addition of C to SmCo7-x Vx could further refine the microstructure, resulting in the improvement of the magnetic properties of SmCo7-x Vx ribbons. The optimal magnetic properties of r =58.7 emu/g, Hi c =13.5 kOe, and (BH) max =9.3 MG Oe can be obtained for SmCo6.9 V0.1 C0.1 ribbon.

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DO - 10.1063/1.3061907

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

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ER -

Crystal structure and magnetic properties of melt spun Sm (Co,V) 7 ribbons

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