Effect of amorphous carbon doping on microstructure and superconducting properties of MgB2 bulk

Qingyang Wang; Guo Yan; Guoqing Liu; Jinshan Li; Pingxiang Zhang; Yafeng Lu; Ye Yang; Minghua Pu; Yong Zhao

Effect of amorphous carbon doping on microstructure and superconducting properties of MgB₂ bulk

Qingyang Wang, Guo Yan, Guoqing Liu, Jinshan Li, Pingxiang Zhang, Yafeng Lu, Ye Yang, Minghua Pu, Yong Zhao

School of Materials Sience and Engineering

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

1 Scopus citations

Abstract

Amorphous carbon doped MgB_2-xC_x (x = 0, 0.05, 0.10, 0.20, 0.30) samples were synthesized by solid state reaction method at 750 °C for 2 h in high pure argon. The microstructure and superconducting properties of all samples were investigated by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and physical property measurement system (PPMS). The results show that a part of doping carbon enters MgB₂ crystal lattice and the residue at grain boundary of MgB₂. Ultra thin MgB₂ grains can be found in slight carbon doped sample, which can improve flux pinning. The J_c value of MgB_1.9C_0.1 sample reaches 8 × 10⁴ A/cm² at 20 K, 3 T.

Original language	English
Pages (from-to)	1440-1443
Number of pages	4
Journal	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
Volume	36
Issue number	8
State	Published - Aug 2007

Keywords

Amorphous carbon
Doping
MgB bulk
Microstructure

Cite this

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title = "Effect of amorphous carbon doping on microstructure and superconducting properties of MgB2 bulk",

abstract = "Amorphous carbon doped MgB2-xCx (x = 0, 0.05, 0.10, 0.20, 0.30) samples were synthesized by solid state reaction method at 750 °C for 2 h in high pure argon. The microstructure and superconducting properties of all samples were investigated by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and physical property measurement system (PPMS). The results show that a part of doping carbon enters MgB2 crystal lattice and the residue at grain boundary of MgB2. Ultra thin MgB2 grains can be found in slight carbon doped sample, which can improve flux pinning. The Jc value of MgB1.9C0.1 sample reaches 8 × 104 A/cm2 at 20 K, 3 T.",

keywords = "Amorphous carbon, Doping, MgB bulk, Microstructure",

author = "Qingyang Wang and Guo Yan and Guoqing Liu and Jinshan Li and Pingxiang Zhang and Yafeng Lu and Ye Yang and Minghua Pu and Yong Zhao",

year = "2007",

month = aug,

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pages = "1440--1443",

journal = "Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering",

issn = "1002-185X",

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TY - JOUR

T1 - Effect of amorphous carbon doping on microstructure and superconducting properties of MgB2 bulk

AU - Wang, Qingyang

AU - Yan, Guo

AU - Liu, Guoqing

AU - Li, Jinshan

AU - Zhang, Pingxiang

AU - Lu, Yafeng

AU - Yang, Ye

AU - Pu, Minghua

AU - Zhao, Yong

PY - 2007/8

Y1 - 2007/8

N2 - Amorphous carbon doped MgB2-xCx (x = 0, 0.05, 0.10, 0.20, 0.30) samples were synthesized by solid state reaction method at 750 °C for 2 h in high pure argon. The microstructure and superconducting properties of all samples were investigated by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and physical property measurement system (PPMS). The results show that a part of doping carbon enters MgB2 crystal lattice and the residue at grain boundary of MgB2. Ultra thin MgB2 grains can be found in slight carbon doped sample, which can improve flux pinning. The Jc value of MgB1.9C0.1 sample reaches 8 × 104 A/cm2 at 20 K, 3 T.

AB - Amorphous carbon doped MgB2-xCx (x = 0, 0.05, 0.10, 0.20, 0.30) samples were synthesized by solid state reaction method at 750 °C for 2 h in high pure argon. The microstructure and superconducting properties of all samples were investigated by X-ray diffraction (XRD), scanning electronic microscopy (SEM) and physical property measurement system (PPMS). The results show that a part of doping carbon enters MgB2 crystal lattice and the residue at grain boundary of MgB2. Ultra thin MgB2 grains can be found in slight carbon doped sample, which can improve flux pinning. The Jc value of MgB1.9C0.1 sample reaches 8 × 104 A/cm2 at 20 K, 3 T.

KW - Amorphous carbon

KW - Doping

KW - MgB bulk

KW - Microstructure

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M3 - 文章

AN - SCOPUS:34948893509

SN - 1002-185X

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SP - 1440

EP - 1443

JO - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

JF - Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering

IS - 8

ER -

Effect of amorphous carbon doping on microstructure and superconducting properties of MgB₂ bulk

Abstract

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