Thank you so much Mr. Farid, I will like to ask you few more questions.
(a) If GL theory is valid why do we need WHH theory?
(b) While fitting experimental data, which equation do we use? WHH or GL equation?
(c) How do we do measurement for thin film superconductors in (VSM) Physical Properties Measurement system (PPMS)? Do we take the measurement of the film with substrate then only the substrate and then subtract the effect of the substrate so that the effective curve that we get is simply due to the superconducting film.