Abstract
Using a sensitive mutual inductance method, measurements of first- and second-order phase transitions in indium microcylinders (2.8–7.6 µm in diameter) have been made. Quantum oscillations in the supercooling field have been observed. The values of κ SC (T/T c )=κ1(T/T c ) derived fromH SC =H C3 have been corrected for both the temperature and the size dependence in the relationship betweenH c2 andH c3 . The results for κ1(T/T c ) from the 7.6-µm sample then agree reasonably well with the temperature dependence of κ1 observed for niobium. However, for the smallest cylinders anomalously low values of κ SC (T/T c ) were obtained nearT c . Very close to the transition temperature second-order (nonhysteretic) phase transitions have been observed and are interpreted in terms of the Ginzburg-Landau theory.
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Michael, P., McLachlan, D.S. Quantum oscillations and reversible and irreversible superconducting phase transitions in indium microcylinders. J Low Temp Phys 14, 607–626 (1974). https://doi.org/10.1007/BF00658884
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DOI: https://doi.org/10.1007/BF00658884