Thermopower and electrical conductivity studies of copper substituted Mg‐Al ferrites are undertaken over the temperature range 300 to 700 K. On the basis of the sign of the Seebeck coefficient (S), the ferrites under study can be considered as n‐type semiconductors. A model is arrived at using Seebeck coefficient data to evaluate the charge carrier concentration. The temperature variation of Seebeck coefficient, carrier concentration (n), and mobility (m̈e) is also discussed. Using the data a conduction mechanism is suggested.
The longitudinal and shear wave velocities of Y–1–2–3 superconducting materials prepared by the sol–gel method have been measured by the pulse transmission technique over a temperature range of 80–300 K. The longitudinal velocity of both the samples, in general, is found to vary in an anomalous way. The observed behaviour has been explained qualitatively on the basis of a model.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.