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Research Article Open Access

Charge carrier transport mechanism in combustion synthesized PrAlO3 perovskite

 

 

Saji S K1*, R Radhakrishnan2 , Jeyasingh T1, Vinodkumar R1, Shibu M. Eappen3

P R Sobhana Wariar1

                     

1Department of Physics, University College, Thiruvananthapuram , 695 034, India

2Department of Theoretical Physics, University of Madras, 600025, India

3STIC, Cochin University of Science and Technology, Cochin, 682 022, India

Adv. Mater. Proc., 2018, 3 (9), 562-565

DOI: 10.5185/amp.2018/7023

Publication Date (Web):05 November 2018

Copyright © IAAM-VBRI Press

Abstract


Abstract

 perovskite material was prepared by solution combustion technique. XRD results revealed that the material crystallizes in a rhombohedral crystal symmetry with space group Rc. The ac conductivity and dielectric properties of the sintered pellet of the sample have been investigated in the frequency range 1Hz to 1MHz for a wide range of temperatures. The experimental results indicate that the ac conductivity (ω), dielectric constant () and dielectric loss ( ) depends on depends on the temperature and frequency. The ac conductivity was found to obey the power law  with and the behavior of exponent n with temperature and the value of n suggest ion hopping is the charge transport mechanism in the material. The obtained results are compared to the principal theories that describe the universal dielectric response behavior. The value   and  were found to be temperature and frequency dependent. Copyright © 2018 VBRI Press.

Keywords


Electronic ceramics, perovskite, rare earth aluminates.