Studies on a.c. properties of Ca1−xSrxTiO3 perovskites |
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| Authors: | H. M. El-Mallah N. A. Hegab |
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| Affiliation: | (1) Department of Physics & Mathematical Engineering, Faculty of Engineering, Suez Canal University, Port-Said, Egypt;(2) Physics Department, Faculty of Education, Ain Shams University, Roxy-Cairo, Egypt |
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| Abstract: | A.c. measurements were preformed on bulk samples of Ca1−x Sr x TiO3 (CST) perovskites with x = 0, 0.1 and 0.5 as a function of temperature range 300–450 K and frequency range 103–105 Hz . The experimental results indicate that the a.c. conductivity σa.c.(ω), dielectric constant ε′ and dielectric loss ε′′ depend on the temperature and frequency. The a.c. conductivity as a function of frequency is well described by a power law Aω S with s the frequency exponent. The obtained values of s > 1 decrease with increasing temperature. The present results are compared to the principal theories that describe the universal dielectric response (UDR) behavior. |
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