Thermal conductivity of LaF3-based single crystals and ceramicsстатья
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Дата последнего поиска статьи во внешних источниках: 3 октября 2019 г.
Аннотация:The thermal conductivity of lanthanum fluoride based single crystals and ceramics (LaF3, La0.975Nd0.025F3, and La0.95Sr0.05F2.95) has been measured at temperatures from 50 to 693 K by an absolute steady-state axial flow technique. We have not detected any anomalies indicative of “two-level systems.” The heat capacity of LaF3 single crystals has been measured in the temperature range 56–300 K. The results are used to evaluate the c-axis phonon mean free path as a function of temperature for single-crystal LaF3.