Temperature anomalies in the impedance and heat capacity of yttrium ceramics at <i>T</i> ≳ <i>T</i> <i>c</i>
V. M. DmitrievPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovV. N. EropkinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovA. M. GurevichPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovA. P. IsakinaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovM. N. OfitserovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovN. N. PrentslauPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, KharkovA. I. ProkhvatilovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Kharkov
ABI
Аннотация
Correlating anomalies in the rf impedance and the heat capacity of single-phase YBa2Cu3O6.8 ceramic are observed for the same sample in the temperature intervals 82–85, 92–95, 155–165, 180–240, and 260–290 K. The anomalies are manifested in the form of peaks and valleys on the temperature dependences of these quantities as well as in hysteresis effects. The nature of the observed peculiarities is discussed.
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