Conventional ac susceptibility measurements and the conditions used in thermal analysis methods have been combined for normal‐superconductor transition studies. Accordingly, during the ac susceptibility measurements, the Y‐based sample is exposed to a temperature gradient. By controlling this gradient, the boundary between normal and superconducting region can be swept slowly at will across the specimen. The extended thermal scanning assures a high resolution to the new method. The observed fine details (even discontinuities) of the susceptibility spectra demonstrate its performance and basis.