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High field performance of nano-diamond doped MgB2 superconductor

Journal Article


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Abstract


  • The results from magnetotransport and magnetization of nanodiamond doped MgB2-nD(x) are reported. Superconducting transition temperature (T-c) is not affected significantly by x up to x=0.05 and latter decreases slightly for higher x>0.05. R(T) vs H measurements show higher T-c values under same applied magnetic fields for the nanodiamond added samples, resulting in higher estimated H-c2 values. From the magnetization measurements, it was found that irreversibility field value H-irr for the pristine sample is 7.5 T at 4 K and the same is increased to 13.5 T for 3 wt % nD added sample at the same temperature. The J(c)(H) plots at all temperatures show that J(c) value is lowest at all applied fields for pristine MgB2 and the sample doped with 3 wt % nD gives the best J(c) values at all fields. These results are discussed in terms of extrinsic pinning due to dispersed n-diamond in the host MgB2 matrix along with the intrinsic pinning due to possible substitution of C at boron site and increased interband scattering for highly doped samples resulting in extraordinary performance of the doped system.

UOW Authors


  •   Vajpayee, Arpita (external author)
  •   Awana, V P. (external author)
  •   Kishan, H (external author)
  •   Narlikar, Anant (external author)
  •   Bhalla, g v. (external author)
  •   Wang, Xiaolin

Publication Date


  • 2008

Citation


  • Vajpayee, A., Awana, v. P., Kishan, H., Narlikar, A., Bhalla, G. L. & Wang, X. (2008). High field performance of nano-diamond doped MgB2 superconductor. In Conference on Magnetism and Magnetic Materials, NOV 05-09, 2007, Tampa, FL, USA. Journal of Applied Physics, 103 (7), 1-12.

Scopus Eid


  • 2-s2.0-42149089369

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1250&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/251

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 1

End Page


  • 12

Volume


  • 103

Issue


  • 7

Place Of Publication


  • USA

Abstract


  • The results from magnetotransport and magnetization of nanodiamond doped MgB2-nD(x) are reported. Superconducting transition temperature (T-c) is not affected significantly by x up to x=0.05 and latter decreases slightly for higher x>0.05. R(T) vs H measurements show higher T-c values under same applied magnetic fields for the nanodiamond added samples, resulting in higher estimated H-c2 values. From the magnetization measurements, it was found that irreversibility field value H-irr for the pristine sample is 7.5 T at 4 K and the same is increased to 13.5 T for 3 wt % nD added sample at the same temperature. The J(c)(H) plots at all temperatures show that J(c) value is lowest at all applied fields for pristine MgB2 and the sample doped with 3 wt % nD gives the best J(c) values at all fields. These results are discussed in terms of extrinsic pinning due to dispersed n-diamond in the host MgB2 matrix along with the intrinsic pinning due to possible substitution of C at boron site and increased interband scattering for highly doped samples resulting in extraordinary performance of the doped system.

UOW Authors


  •   Vajpayee, Arpita (external author)
  •   Awana, V P. (external author)
  •   Kishan, H (external author)
  •   Narlikar, Anant (external author)
  •   Bhalla, g v. (external author)
  •   Wang, Xiaolin

Publication Date


  • 2008

Citation


  • Vajpayee, A., Awana, v. P., Kishan, H., Narlikar, A., Bhalla, G. L. & Wang, X. (2008). High field performance of nano-diamond doped MgB2 superconductor. In Conference on Magnetism and Magnetic Materials, NOV 05-09, 2007, Tampa, FL, USA. Journal of Applied Physics, 103 (7), 1-12.

Scopus Eid


  • 2-s2.0-42149089369

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1250&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/251

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 1

End Page


  • 12

Volume


  • 103

Issue


  • 7

Place Of Publication


  • USA