TY - JOUR
T1 - On the magnetic field dependence of critical current density in single crystals of high-Tc superconductors
AU - Yamafuji, K.
AU - Fujiyoshi, T.
AU - Toko, K.
AU - Matsuno, T.
AU - Kobayashi, T.
AU - Kishio, K.
N1 - Funding Information:
The present work is supported by a Grant-in-Aid for Scientific Researcho n Priority Areas, “Science of High-T, Superconductivity” given by the Ministry of Education, Science and Culture, Japan.
PY - 1994/6/1
Y1 - 1994/6/1
N2 - The critical current density, Jc, is discussed theoretically to explain the exponential dependence of Jc on the flux density, B, given typically by Jc∝exp( -B B0(T)), which has been widely observed for single crystals of high-Tc superconductors in an external magnetic field parallel to the crystal c-axis. It is pointed out that Jc shows an exponential-type dependence, Jc∝exp(-f{hook}f(B, T)), when the tilt modulus, C44, of fluxoids shows a remarkable softening for higher values of the wave number. It is also shown that the present expression of Jc is reduced to the observed B dependence of f{hook}(B, T){reversed tilde equals} B B0(T) by taking account of th e effects of the layered crystal structure on C44 and the correlation length, l44.
AB - The critical current density, Jc, is discussed theoretically to explain the exponential dependence of Jc on the flux density, B, given typically by Jc∝exp( -B B0(T)), which has been widely observed for single crystals of high-Tc superconductors in an external magnetic field parallel to the crystal c-axis. It is pointed out that Jc shows an exponential-type dependence, Jc∝exp(-f{hook}f(B, T)), when the tilt modulus, C44, of fluxoids shows a remarkable softening for higher values of the wave number. It is also shown that the present expression of Jc is reduced to the observed B dependence of f{hook}(B, T){reversed tilde equals} B B0(T) by taking account of th e effects of the layered crystal structure on C44 and the correlation length, l44.
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U2 - 10.1016/0921-4534(94)90487-1
DO - 10.1016/0921-4534(94)90487-1
M3 - Article
AN - SCOPUS:0028446980
SN - 0921-4534
VL - 226
SP - 133
EP - 142
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 1-2
ER -