caa a22 4500 463220854 CHVBK 20180405153211.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10853-006-1030-7 doi (NATIONALLICENCE)springer-10.1007/s10853-006-1030-7 Studies on a.c. properties of Ca1− x Sr x TiO3 perovskites [Elektronische Daten] [H. El-Mallah, N. Hegab] 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 300-450K and frequency range 103-105Hz . 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. Springer Science+Business Media, LLC, 2006 El-Mallah H. Department of Physics & Mathematical Engineering, Faculty of Engineering, Suez Canal University, Port-Said, Egypt aut Hegab N. Physics Department, Faculty of Education, Ain Shams University, Roxy-Cairo, Egypt aut Journal of Materials Science Springer US; http://www.springer-ny.com 42/1(2007-01-01), 332-336 0022-2461 42:1<332 2007 42 10853 https://doi.org/10.1007/s10853-006-1030-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-006-1030-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- El-Mallah H. Department of Physics & Mathematical Engineering, Faculty of Engineering, Suez Canal University, Port-Said, Egypt aut NATIONALLICENCE 700 1- Hegab N. Physics Department, Faculty of Education, Ain Shams University, Roxy-Cairo, Egypt aut NATIONALLICENCE 773 0- Journal of Materials Science Springer US; http://www.springer-ny.com 42/1(2007-01-01), 332-336 0022-2461 42:1<332 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer