TY - JOUR
T1 - Improved Transport Jc in MgB2 Tapes by Graphene Doping
AU - Tang, Shaopu
AU - Wang, Dongliang
AU - Zhang, Xianping
AU - Zhang, Qianjun
AU - Li, Chen
AU - Ma, Yanwei
AU - Oguro, Hidetoshi
AU - Awaji, Satoshi
AU - Watanabe, Kazuo
N1 - Funding Information:
Acknowledgments This work is partially supported by the National Natural Science Foundation of China (Grant Nos. 51025726, 51202243, and 51104136) and the National ‘973’ Program (Grant No. 2011CBA00105).
Publisher Copyright:
© 2014, Springer Science+Business Media New York.
PY - 2014/11/18
Y1 - 2014/11/18
N2 - Graphene is a special form of carbon which can effectively enhance the critical current density Jc of MgB2. In this work, a systematic investigation on the impact of sintering conditions and doping level was carried out for graphene-doped MgB2 tapes. It is found that an appropriate addition level, i.e., 8 at% in this work, is very critical to obtain a high Jc in graphene-doped samples. The critical field and pinning force are improved obviously due to the graphene doping. The magnetic Jc of samples sintered at 800 °C with 8 at% graphene doping reached 1.78 × 104 A/cm2, at 5 T, 20 K. At the same time, the transport Jc was up to 2.38 × 104 A/cm2 at 10 T, 4.2 K. The lattice distortion caused by C substitution and residual C at the grain boundaries were thought to be the major factors affecting the Jc of graphene-doped MgB2 samples.
AB - Graphene is a special form of carbon which can effectively enhance the critical current density Jc of MgB2. In this work, a systematic investigation on the impact of sintering conditions and doping level was carried out for graphene-doped MgB2 tapes. It is found that an appropriate addition level, i.e., 8 at% in this work, is very critical to obtain a high Jc in graphene-doped samples. The critical field and pinning force are improved obviously due to the graphene doping. The magnetic Jc of samples sintered at 800 °C with 8 at% graphene doping reached 1.78 × 104 A/cm2, at 5 T, 20 K. At the same time, the transport Jc was up to 2.38 × 104 A/cm2 at 10 T, 4.2 K. The lattice distortion caused by C substitution and residual C at the grain boundaries were thought to be the major factors affecting the Jc of graphene-doped MgB2 samples.
KW - Graphene doping
KW - MgB2 tapes
KW - Transport J
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U2 - 10.1007/s10948-014-2804-9
DO - 10.1007/s10948-014-2804-9
M3 - Article
AN - SCOPUS:84911807322
SN - 1557-1939
VL - 27
SP - 2699
EP - 2705
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 12
ER -