TY - JOUR
T1 - Thermally-activated vortex dynamics in bismuth calcium strontium copper oxide (Bi2CaSr2Cu2O8+δ) studied by complex susceptibility measurements
AU - Emmen, J.H.P.M.
AU - Brabers, V.A.M.
AU - Jonge, de, W.J.M.
PY - 1991
Y1 - 1991
N2 - Complex AC magnetic susceptibility has been measured on Bi2CaSr2Cu2O8+d single crystals with hnc, Hdc|c-axis. It will be shown that field, frequency and temperature dependence of both ¿' and ¿¿ in a constant but sufficiently large DC magnetic field can quantitatively be described by thermally-activated flux flow (TAFF) provided that a narrow distribution of activation energies is implemented. From the frequency dependence of the AC¿ transition, a power law for the DC field dependence of the activation energy has been found, with an exponent -1/4.
AB - Complex AC magnetic susceptibility has been measured on Bi2CaSr2Cu2O8+d single crystals with hnc, Hdc|c-axis. It will be shown that field, frequency and temperature dependence of both ¿' and ¿¿ in a constant but sufficiently large DC magnetic field can quantitatively be described by thermally-activated flux flow (TAFF) provided that a narrow distribution of activation energies is implemented. From the frequency dependence of the AC¿ transition, a power law for the DC field dependence of the activation energy has been found, with an exponent -1/4.
U2 - 10.1016/0921-4534(91)90706-5
DO - 10.1016/0921-4534(91)90706-5
M3 - Article
VL - 176
SP - 137
EP - 146
JO - Physica C : Superconductivity
JF - Physica C : Superconductivity
SN - 0921-4534
IS - 1-3
ER -