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Superconducting Properties of Ti3SiC2-Doped Bulk MgB2 Superconductor
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Superconducting Properties of Ti3SiC2-Doped Bulk MgB2 Superconductor
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National Natural Science Foundation of China (50877067) and National Basic Research Program of China (2011CBA00104)

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    摘要:

    研究了Ti3SiC2摻雜對(duì)MgB2的晶格參數(shù) (a)、微觀結(jié)構(gòu)、超導(dǎo)轉(zhuǎn)變溫度 (Tc) 和臨界電流密度 (Jc) 的影響。隨著Ti3SiC2摻雜量的增加，晶格參數(shù)a逐漸變小，表明了C進(jìn)入晶格代替B位的發(fā)生。隨著摻雜量的增加，超導(dǎo)轉(zhuǎn)變溫度Tc從37.15 K降低到36.55 K。利用Bean模型通過(guò)M-H 磁滯回線計(jì)算了樣品的Jc值。結(jié)果表明，在低場(chǎng)區(qū)域，未摻雜樣品的Jc值高于Ti3SiC2摻雜樣品的Jc值。然而隨著磁場(chǎng)的進(jìn)一步增大，適量摻雜的樣品Jc值得到提高。

    Abstract:

    The effects of Ti3SiC2 doping on lattice parameter (a), microstructure, critical temperature (Tc) and critical current density (Jc) of MgB2 superconductors were studied. Carbon substitution for boron could be confirmed by the shrinkage of the lattice parameter a with increasing of Ti3SiC2 doping level. A reduction of Tc from 37.15 K to 36.55 K with increasing of Ti3SiC2 doping was observed. The Jc values were determined by M-H hysteresis loops. Results show that in low magnetic field region, the Jc value for the undoped sample is higher than those for the doped samples. However, with the increase of the magnetic field, the Jc for the properly doped samples will be enhanced.

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單 迪,閆 果,周 廉,李成山,王慶陽(yáng),張勝楠,熊曉梅,劉國(guó)慶. Superconducting Properties of Ti3SiC2-Doped Bulk MgB2 Superconductor[J].稀有金屬材料與工程,2012,41(7):1135~1138.[Shan Di, Yan Guo, Zhou Lian, Li Chengshan, Wang Qingyang, Zhang Shengnan, Xiong Xiaomei, Liu Guoqing. Superconducting Properties of Ti3SiC2-Doped Bulk MgB2 Superconductor[J]. Rare Metal Materials and Engineering,2012,41(7):1135~1138.]
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  • 收稿日期:2011-11-05
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