Title :
Intergrain Connectivity and Resistive Broadening in Vortex State: A Comparison Between MgB2, NbSe2 and Bi2Sr2
Author :
Kaushik, S.D. ; Patnaik, S.
Author_Institution :
Jawaharlal Nehru Univ., New Delhi
fDate :
6/1/2007 12:00:00 AM
Abstract :
Magnetoresistance and radio frequency penetration depth techniques are used to study grain connectivity and broadening of the superconducting transition. We study these issues in three different superconducting systems e.g. MgB2, NbSe2 and Bi2Sr2Ca2Cu3O10 . Some of the samples are irradiated with heavy ions. From the rf response, the bulk pinning force constant is evaluated. From high field transport measurements, H - T phase diagrams are compared for the three systems with varying degrees of fluctuation and connectivity.
Keywords :
bismuth compounds; calcium compounds; flux pinning; high-temperature superconductors; ion beam effects; magnesium compounds; magnetoresistance; niobium compounds; penetration depth (superconductivity); phase diagrams; strontium compounds; superconducting transitions; Bi2Sr2Ca2Cu3O10; H-T phase diagrams; MgB2; NbSe2; bulk pinning force constant; fluctuation degrees; high field transport measurements; intergrain connectivity; magnetoresistance; radio frequency penetration depth; resistive broadening; rf response; superconducting transition; superconductors; vortex state; Bismuth compounds; Fluctuations; Magnetic anisotropy; Magnetic field measurement; Magnetic flux; Perpendicular magnetic anisotropy; Silver; Superconducting magnets; Superconducting transition temperature; Superconductivity; Magnetoresistance; rf penetration depth; superconductor; vortex dynamics;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2007.899387
