The effects of graphene doping on the phase formation and superconductivity of MgB2 bulks synthesized with different process have been studied systemically. Considering the scattering structure of graphene, coating method was applied to enhance the uniformity of graphene doping. The graphene coated B addition was expected to improve the critical current density of MgB2 bulks. In our study, several experiments were performed to find out the suitable way for graphene doping. The coating method could enhance the critical current density of MgB2 from 1.9 × 105 to 2.5 × 105 A/cm2 at 20 K and 0 T, compared with that of the undoped sample. And the superconductivity of MgB2 prepared by coating method got obvious improvement at high field compared with that of pure graphene doping bulk. It can be concluded that the coating method could ensure the uniformity of graphene doping in MgB2 and refined the grain crystalline effectively.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
Nagamatsu, J., Nakagawa, N., Muranaka, T., Zenitani, Y., Akimitsu, J.: Superconductivity at 39K in magnesium diboride. Nature 410, 63 (2001)
Neson, V., Vinod, K., Syamaprasad, U., Roy, S.B.: Doping effect of nano-SiC on structural and superconducting properties of MgB2 bulks prepared by PIST method in air. J. Alloys Compd. 484, 734 (2009)
Wong, D.C.K., Yeoh, W.K., De Silva, K.S.B., Kondyurin, A., Bao, P., Li, W.X., Xu, X., Peleckis, G., Dou, S.X., Ringer, S.P., Zheng, R.K.: Microscopic unravelling of nano-carbon doping in MgB2 superconductors fabricated by diffusion method. J. Alloys Compd. 644, 900 (2015)
Dou, S.X., Pan, A.V., Zhou, S., Ionescu, M., Wang, X.L., Horvat, J., Liu, H.K., Munroe, P.R.: Superconductivity, critical current density flux pinning in MgB2−x,(SiC)x/2 superconductor after SiC nanoparticle doping. J. Appl Phys. 94, 1850 (2003)
Yuri, L., Ernst, W.S., Tao, Z.: Novel technologies and configurations of superconducting magnets for MRI. Supercond. Sci. Technol. 26, 093001 (2013)
Sudesh, Das, S., Bernhard, C., Varma, G.D: Enhanced superconducting properties of rare-earth oxides and graphene oxide added MgB2. Phys. C 505, 32 (2014)
Jafar, M.P., Mohammed, S., Shaha, M.S., Alzayeda, N.S., Qaida, S.A.S., Niyaz, A.M., Shahid, M.R., Muhammad, A.S.: Effects of glucose doping on the MgB2 superconductors using cheap crystalline boron. Phys. C 519, 137 (2015)
De Silva, K.S.B., Xu, X., Li, W.X., Zhang, Y., Rindfleisch, M., Tomsic, M.: Improving superconducting properties of MgB2 by graphene doping. IEEE Trans. Appl. Supercond. 21, 2686 (2011)
Soltanian, S., Wang, X., Horvat, J., Dou, S., Sumption, M., Bhatia, M., Collings, E.W., Munroe, P., Tomsic, M.: High transport critical current density and large H c2 and H i r r in nanoscale SiC doped MgB2 wires sintered at low temperature, Supercond. Sci. Technol. 18, 658 (2005)
Aldica, G., Burdusel, M., Popa, S., Hayasak, Y., Badicaa, P.: Graphene addition to MgB2 superconductor obtained by ex-situ spark plasma sintering technique, Mate. Res. Bull. 77, 205 (2016)
Xu, X., Dou, S.X., Wang, X.L., Kim, J.H., Stride, J.A., Choucair, M., Yeoh, W.K., Zheng, R.K., Ringer, S.P.: Graphene doping to enhance the flux pinning and supercurrent carrying ability of amagnesium diboride superconductor. Supercond. Sci. Technol. 23, 085003 (2010)
Sudesh, Das, S., Bernhard, C., Varma, G.D.: Effect of combined addition of graphene oxide and citric acid on superconducting properties of MgB2. Phys. C 509, 49 (2015)
Monika, M., Awana, V.P.S., Kishan, H., Bhalla, G.L.: Significant improvement of flux pinning and irreversibility field in nano-carbon-doped MgB2 superconductor. Solid State Commun. 146, 330 (2008)
De Silva, K.S.B., Xu, X., Gambir, S., Wong, D.C.K., Li, W.X., Hu, Q.Y.: Effect of sintering temperature on the superconducting properties of graphene doped MgB2. IEEE Trans. Appl. Supercond. 23, 7100604 (2013)
De Silva, K.S.B., Xu, X., Gambhir, S., Wang, X.L., Li, W.X., Wallace, G.G., Dou, S.X.: Flux pinning mechanisms in graphene-doped MgB2 superconductors. Scripta Mater. 65, 634 (2011)
Li, W.X., Xu, X., De Silva, K.S.B., Xiang, F.X., Dou, S.X.: Graphene micro-substrate induced high electron-phonon coupling in MgB2. IEEE Trans. Appl. Supercond. 23, 7000104 (2013)
Kovc, P., Husek, I., Skakalova, V., Meyer, J., Dobrocka, E., Hirscher, M., Roth, S: Transport current improvements of in situ MgB2 tapes by the addition of carbon nanotubes, silicon carbide or graphite, Supercond. Sci. Technol. 20, 105 (2007)
Bean, C.P.: Magnetization of high-field superconductors. Phys. Rev. Lett. 36, 31 (1962)
Li, W. X., Xu, X., Chen, Q.H., Zhang, Y., Zhou, S.H., Zeng, R., Dou, S.X.: Graphene micro-substrate-induced gapexpansion in MgB2. Acta Mater. 59, 7268 (2011)
This work was financially supported by the National Natural Science Foundation (No 51772250 and 51372207) and the Natural Science Basic Research Plan in Shanxi Province of China (No 2017ZDJC-19).
About this article
Cite this article
Liu, H., Yang, F., Jin, L. et al. Improved Superconducting Properties in Graphene-Doped MgB2 Prepared by Coating Method. J Supercond Nov Magn 31, 1053–1058 (2018). https://doi.org/10.1007/s10948-017-4309-9
- MgB2 superconductor
- Critical current density
- Graphene doping