Title :
Critical dynamics of superconducting Bi2Sr2CaCu2O8 single crystal
Author :
Jin-Tae Kim ; Chung, S.H. ; Ha, D.H. ; Yoo, K.H. ; Park, Y.K. ; Park, J.C. ; Kim, M.-S. ; Lee, Sung-Ik
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Taejon, South Korea
fDate :
9/1/1999 12:00:00 AM
Abstract :
The magnetization and resistivity of Bi2Sr2CaCu2O8 (Bi-2212) single crystals have been measured as a function of magnetic field H and temperature T. The extracted fluctuation part of the magnetization and conductivity exhibit critical behavior consistent with the three dimensional XY model. The dynamic critical exponent z is 1.6±0.1, which is close to the value for YBCO. The static critical exponent v is 0.769 and 0.909 respectively for the magnetization and conductivity data. The values of v are larger than that of YBCO. The results indicate that the weak interlayer coupling along the c-axis of Bi-2212 does not influence the dynamic critical exponent z but significantly increases the static critical exponent v
Keywords :
X-Y model; bismuth compounds; calcium compounds; critical exponents; electrical conductivity; electrical resistivity; fluctuations in superconductors; high-temperature superconductors; magnetisation; strontium compounds; Bi2Sr2CaCu2O8; HTSC; conductivity; critical behavior; critical dynamics; dynamic critical exponent; extracted fluctuation part; magnetization; resistivity; static critical exponent; superconducting Bi2Sr2CaCu2O8 single crystal; three dimensional XY model; weak interlayer coupling; Bismuth; Conductivity measurement; Crystals; Data mining; Fluctuations; Magnetic field measurement; Magnetization; Strontium; Temperature; Yttrium barium copper oxide;
Journal_Title :
Magnetics, IEEE Transactions on
