TY - GEN
T1 - Effect of SWCNT dilution on the resistivity of MgB2
AU - Ma, Danhao
AU - Jayasingha, Ruwantha
AU - Hess, Dustin
AU - Adu, Kofi W.
AU - Sumanasekera, Gamini U.
PY - 2013
Y1 - 2013
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84899823989&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84899823989&partnerID=8YFLogxK
U2 - 10.1557/opl.2013.537
DO - 10.1557/opl.2013.537
M3 - Conference contribution
AN - SCOPUS:84899823989
SN - 9781632660985
T3 - Materials Research Society Symposium Proceedings
SP - 199
EP - 204
BT - Carbon Nanomaterials
PB - Materials Research Society
T2 - 2012 MRS Fall Meeting
Y2 - 25 November 2012 through 30 November 2012
ER -