Dielectric Anomalies in a New Manganocuprate, Gd3Ba2Mn2Cu2O12

Details Dielectric Anomalies in a New Manganocuprate, Gd3Ba2Mn2Cu2O12 Dielectric Anomalies in a New Manganocuprate, Gd3Ba2Mn2Cu2O12

2009-09-04

arxiv.org/abs/0909.0850v1

Physics

Condensed Matter

Materials Science

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Scientific paper

Dielectric response has been studied for a new manganocuprate, Gd3Ba2Mn2Cu2O12 (Gd3222) as a function of temperature (100 - 300 K) and frequency (75 kHz to 1 MHz). The dielectric constant (e) exhibits a two step increase (two peaks) in e(T) with increasing temperature from 100 to 300 K. The first peak is seen around 150 K and the second one around 210 K (both for 75 kHz). Increasing frequency shifts both the peaks to higher temperature side. The behavior of dielectric constant (e) and dielectric loss (tan_delta) matches with glassy behavior observed in many dipolar molecules.

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