Thermal conductivity of the Bi2(Ca0.5Sr0.5)3Cu2Ox, Tl2Ba2Ca2Ox ceramics and GdBa2Cu3Ox single crystalsстатья
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Дата последнего поиска статьи во внешних источниках: 17 ноября 2016 г.
Аннотация:The maximum of thermal conductivity k(T) at Tmax= 90 K in Tl2Ba2Ca2Cu3Ox and two maxima at 80 and 115 K in Bi2(Ca0.5Sr0.5)3Cu2Ox compounds are found. The superconducting critical temperatures of the Tl-based oxide (Tc=120 K) and of the two phase Bi-based oxide (Tc = 80 K and 110 K) are in a good agreement with temperatures at which the k(T) increase is observed. The k(T) dependence of single crystalline GdBa2Cu3Ox samples demonstrates ``phonon'' anomaly at temperatures near 60 K