title: A single electric relaxation time in Ba(1-x)Sr(x)TiO(3) nanoparticles at low temperatures.
abstract: It is shown that the dielectric response of Ba(0.77)Sr(0.23)TiO(3) nanoparticles at temperatures below 200 K has a frequency and temperature dependence in agreement with the Debye theory with a single relaxation time, which exhibits the Arrhenius law. By contrast, at temperatures above 210 K the dielectric response exhibits a broad range of relaxation times characteristic of relaxor-ferroelectrics. We suggest that the single relaxation time at low temperature originates from a frustration effect, in analogy with frustrated antiferromagnetism.
authors: School of Physics, Georgia Institute of Technology, Atlanta, GA 30332-0430, USA.
authors: Liyuan
authors: L
authors: Zhang
authors: Jun
authors: J
authors: Zhou
authors: Zhonglin
authors: Z
authors: Wang
authors: D
authors: D
authors: Davidović