Effect of SWCNT dilution on the resistivity of MgB2

Danhao Ma, Ruwantha Jayasingha, Dustin Hess, Kofi W. Adu, Gamini U. Sumanasekera

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We report an increase in superconducting temperature of magnesium diboride (MgB2) by minute single-wall carbon nanotubes (SWCNT) inclusions. The SWCNTs concentration was varied from 0.1 wt% to 1.0wt%. The temperature dependence resistivity of sintered MgB2- SWCNTs composites containing 0.1 wt%, 0.5wt% and 1.0wt% were measured and compared with that of the pure MgB2. The superconducting critical temperature (Tc) of the MgB2 increased from 40 K to as high as 42.4 K for the MgB 2 containing 0.5wt% of SWCNTs. The room temperature resistivity ratio (RRR) shows dependence on the sample composition. The temperature width (ΔT) decreases with increasing SWCNT content from 0.1 wt% to 1.0wt%. The normal state resistivity data were fitted with the generalized Block-Griineisen function obtaining a Debye temperature of ∼ 900K.

Original languageEnglish (US)
Title of host publicationCarbon Nanomaterials
PublisherMaterials Research Society
Number of pages6
ISBN (Print)9781632660985
StatePublished - Jan 1 2013
Event2012 MRS Fall Meeting - Boston, MA, United States
Duration: Nov 25 2012Nov 30 2012

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


Other2012 MRS Fall Meeting
CountryUnited States
CityBoston, MA


All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Ma, D., Jayasingha, R., Hess, D., Adu, K. W., & Sumanasekera, G. U. (2013). Effect of SWCNT dilution on the resistivity of MgB2. In Carbon Nanomaterials (pp. 199-204). (Materials Research Society Symposium Proceedings; Vol. 1505). Materials Research Society. https://doi.org/10.1557/opl.2013.537