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Title: Electrical, optical and magnetic investigations on LiNiPO{sub 4} based olivines synthesized by solution combustion technique

Highlights: • Solution combustion technique and preparation of nanocrystalline olivine materials. • Olivine type LiNiPO{sub 4} based nanocrystalline materials and characterization. • AC electrical studies on olivine type LiNi{sub 1−x}M{sub x}PO{sub 4}(M = Cu{sup 2+}/Mg{sup 2+})based materials. • Enhancement of ionic conductivity in the nanocrystalline phase of LiNiPO{sub 4} material. - Abstract: Citric acid assisted solution combustion technique is explored for synthesis of supervalent Cu{sup 2+}/Mg{sup 2+} ion doped LiNiPO{sub 4} system. XRD, FT-IR and microscopy studies confirmed the formation of a well crystallized material at low concentration of dopants. Ionic conductivity increases for lower concentrations of dopants due to the increased channel size for Li{sup +} diffusion. Owing to inherent anti-site defects, ionic conductivity decreases with increase of dopant concentration. Magnetic studies are explored for confirmation of antiferromagnetic nature of ions. Wagner polarization method is used to elucidate the negligible contribution of electrons to total conductivity.
Authors:
 [1] ;  [2] ;  [2]
  1. St. Aloysius College, Edathua, Alappuzha (District), Kerala 689573 (India)
  2. Department of Physics, School of Physical, Chemical and Applied Sciences, Pondicherry University, R.V. Nagar, Kalapet, Pondicherry 605 014 (India)
Publication Date:
OSTI Identifier:
22345222
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 50; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ANTIFERROMAGNETISM; COPPER IONS; CRYSTALS; DEFECTS; DIFFUSION; DOPED MATERIALS; ELECTRONS; FOURIER TRANSFORMATION; INFRARED SPECTRA; IONIC CONDUCTIVITY; LITHIUM IONS; MICROSCOPY; NANOSTRUCTURES; POLARIZATION; SPECTROSCOPY; SYNTHESIS; X-RAY DIFFRACTION