Dielectric Anomalies in a New Manganocuprate, Gd3Ba2Mn2Cu2O12

Sudhindra Rayaprol; Anjana Dogra; S. D. Kaushik; Kiran Singh; S. Bhattacharya; G. Anjum; Y. Kumar; N. K. Gaur; Ravi Kumar

Dielectric Anomalies in a New Manganocuprate, Gd3Ba2Mn2Cu2O12

Materials Science 2009-09-07 v1 Other Condensed Matter

Authors: Sudhindra Rayaprol , Anjana Dogra , S. D. Kaushik , Kiran Singh , S. Bhattacharya , G. Anjum , Y. Kumar , N. K. Gaur , Ravi Kumar

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Abstract

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.

Keywords

dielectric anomaly manganocuprate Gd3Ba2Mn2Cu2O12 dielectric constant dielectric loss glassy behavior

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@article{arxiv.0909.0850,
  title  = {Dielectric Anomalies in a New Manganocuprate, Gd3Ba2Mn2Cu2O12},
  author = {Sudhindra Rayaprol and Anjana Dogra and S. D. Kaushik and Kiran Singh and S. Bhattacharya and G. Anjum and Y. Kumar and N. K. Gaur and Ravi Kumar},
  journal= {arXiv preprint arXiv:0909.0850},
  year   = {2009}
}

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Dielectric Anomalies in a New Manganocuprate, Gd3Ba2Mn2Cu2O12

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