Title :
The irreversibility line of (Bi,Pb)2Sr2Ca2Cu3O10 determined by DC magnetization
Author :
Green, S.M. ; Lobb, C.J. ; Greene, R.L.
Author_Institution :
Dept. of Phys. & Astron., Maryland Univ., College Park, MD, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
The irreversibility line, H*(T), of c axis aligned B1.65Pb0.35Sr2Ca2Cu3 O10 is analyzed based on DC magnetization measurements for fields of up to 50 kOe. Its temperature dependence is found to be strongly based on the criterion used to determine irreversibility. Using sensitivity criteria of 5, 15, and 25×10-5 emu, the low field data fit H*~H0*(1-T/Tc)7, with γ≈2.3-2.6 and H0*~1.8×104 emu. Using fitted curves, the irreversibility line follows this equation over the entire field range with γ≈3.2 and H0*~35×104 emu
Keywords :
bismuth compounds; calcium compounds; high-temperature superconductors; lead compounds; magnetisation; strontium compounds; superconducting critical field; DC magnetization; c axis aligned B1.65Pb0.35Sr2Ca2Cu3O10; fitted curves; high temperature superconductivity; irreversibility line; sensitivity criteria; temperature dependence; Convergence; Cooling; Equations; Magnetic field measurement; Magnetization; Pollution measurement; Powders; Strontium; Temperature; X-ray diffraction;
Journal_Title :
Magnetics, IEEE Transactions on
