Dielectric relaxation in SrTiO[sub 3]-SrMg[sub 1/3]Nb[sub 2/3]O[sub 3] and SrTiO[sub 3]-SrSc[sub 1/2]Ta[sub 1/2]O[sub 3] solid solutions

Lemanov, V. V.; Lemanov, V.V.; Smirnova, E. P.; Smirnova, E.P.; Sotnikov, A. V.; Sotnikov, A.V.; Weihnacht, M.
December 2000
Applied Physics Letters;12/18/2000, Vol. 77 Issue 25
Academic Journal
Dielectric properties of ceramic samples of (1-x)SrTiO[sub 3]-xSrMg[sub 1/3]Nb[sub 2/3]O[sub 3] and (1-x)SrTiO[sub 3]-xSrSc[sub 1/2]Ta[sub 1/2]O[sub 3] solid solutions were studied at x≤15% and x≤10%, respectively. The real and imaginary parts of the dielectric constant were measured at frequencies between 10 Hz and 1 MHz and in a temperature range of 4.2-300 K. Remarkable relaxation was found between 80 and 300 K. The relaxation was suggested to be due to local charge compensation processes. The activation energy for these processes was determined to be (0.25±0.05) eV with τ[sub 0]=(10[sup -12]...10[sup -13]) s. © 2000 American Institute of Physics.


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