The low-field AC susceptibility of type-II superconducting thin films

AC susceptibility study of Bi1.66Pb0.34Sr2Ca2−xMgxCu3Oy (x=0, 0.2 and 0.4) superconductor systems

“…It is also employed to estimate some of the important physical properties like critical current density, J c and effective volume fraction of the superconducting grains [20][21][22][23]. Several critical state models have been very successful in accounting for major features of the temperature and field variation of AC susceptibility [24][25][26].…”

Effect of deoxygenation on the weak-link behavior of YBa2Cu3O7−δ superconductors

“…It is also employed to estimate some of the important physical properties like critical current density Jc and effective volume fraction of the superconducting grains [10][11][12][13]. Several critical state models have been very successful in accounting for major features of the temperature and field variation of AC susceptibility [14][15][16].…”

AC susceptibility study in the single-phase Bi-2223 system

“…Since the demagnetizing correction would cause χ = −1 for low enough temperature, we have normalised experimental AC susceptibility data χ (T ) and χ (T ) with respect to |χ | at the lowest temperature and the lowest field amplitude for f = 330 Hz, where the lowest value of the real part of χ can be seen. A plot of χ and χ contains only dimensionless quantities and therefore very useful for analysing experimental data [10][11][12][13]. Figure 4 displays the χ (χ ) plot of the data shown in Fig.…”