Structural and impedance spectroscopy of α-Mn2O3

Mohit Chandra, Satish Yadav, S. Rayaprol, K. Singh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

The polycrystalline sample of α-Mn2O3 has been synthesized through standard solid-state reaction method. The room temperature (RT) powder X-ray and neutron diffraction has been performed to understand its crystal structure. The X-ray and neutron diffraction data refined using Rietveld analysis which shows the single-phase of the prepared sample with orthorhombic structure (Pcab). The detailed ac electrical measurements were carried out using dielectric constant and impedance spectroscopy at different temperatures at wide frequency range (4 Hz-1 MHz). The temperature dependent dielectric results show sharp increase in dielectric constant near 240 K which can be seen as the frequency dependent peak in tanδ. The non-Debye type dielectric relaxation is observed at broad temperature near room temperature. The contributions of grain and grain boundaries are also explored using impedance spectroscopy.

Original languageEnglish
Title of host publicationDAE Solid State Physics Symposium 2017
EditorsAmitabh Das, Surendra Singh, Arup Biswas
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416345
DOIs
StatePublished - Apr 10 2018
Externally publishedYes
Event62nd DAE Solid State Physics Symposium 2017 - Anushaktinagar, Mumbai, India
Duration: Dec 26 2017Dec 30 2017

Publication series

NameAIP Conference Proceedings
Volume1942
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference62nd DAE Solid State Physics Symposium 2017
Country/TerritoryIndia
CityAnushaktinagar, Mumbai
Period12/26/1712/30/17

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