Volume 103, Number 3, August 2013
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||29 August 2013|
Intermediate-range structure in ion-conducting tellurite glasses
1 Sección Fisicoquímica, INQUISUR- UNS-CONICET and Departamento de Química Universidad Nacional del Sur Avenida Alem 1253, 8000 Bahía Blanca, Argentina
2 Instituto de Investigaciones Físicas de Mar del Plata (IFIMAR) and Departamento de Física FCEyN, Universidad Nacional de Mar del Plata - Deán Funes 3350, 7600 Mar del Plata, Argentina
Received: 28 February 2013
Accepted: 3 August 2013
We present ac conductivity spectra of telluritie glasses at several temperatures. For the first time, we report oscillatory modulations at frequencies around MHz. This effect is more pronounced the lower the temperature, and washes out when approaching the glass transition temperature Tg. We show, by using a minimal model, how this modulation may be attributed to the fractal structure of the glass at intermediate mesoscopic length scales.
PACS: 66.30.H- – Self-diffusion and ionic conduction in nonmetals / 61.43.Hv – Fractals; macroscopic aggregates (including diffusion-limited aggregates)
© EPLA, 2013
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