Improved Superconducting Properties in Graphene-Doped MgB2 Prepared by Coating Method


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.

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  1. 1.

    Nagamatsu, J., Nakagawa, N., Muranaka, T., Zenitani, Y., Akimitsu, J.: Superconductivity at 39K in magnesium diboride. Nature 410, 63 (2001)

    ADS  Article  Google Scholar 

  2. 2.

    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)

    Article  Google Scholar 

  3. 3.

    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)

    Article  Google Scholar 

  4. 4.

    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)

    ADS  Article  Google Scholar 

  5. 5.

    Yuri, L., Ernst, W.S., Tao, Z.: Novel technologies and configurations of superconducting magnets for MRI. Supercond. Sci. Technol. 26, 093001 (2013)

    Article  Google Scholar 

  6. 6.

    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)

    ADS  Article  Google Scholar 

  7. 7.

    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)

    ADS  Article  Google Scholar 

  8. 8.

    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)

    ADS  Article  Google Scholar 

  9. 9.

    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)

    ADS  Google Scholar 

  10. 10.

    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)

    Article  Google Scholar 

  11. 11.

    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)

    ADS  Article  Google Scholar 

  12. 12.

    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)

    Article  Google Scholar 

  13. 13.

    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)

    ADS  Article  Google Scholar 

  14. 14.

    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)

    Article  Google Scholar 

  15. 15.

    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)

    Article  Google Scholar 

  16. 16.

    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)

    Article  Google Scholar 

  17. 17.

    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)

    ADS  Google Scholar 

  18. 18.

    Bean, C.P.: Magnetization of high-field superconductors. Phys. Rev. Lett. 36, 31 (1962)

    MATH  Google Scholar 

  19. 19.

    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)

    Article  Google Scholar 

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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).

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Correspondence to Fang Yang.

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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).

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  • MgB2 superconductor
  • Critical current density
  • Graphene doping
  • Microstructure
  • Composites