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Title: Ion transport study of mechanically-milled amorphous AgI-Ag₂O-V₂O₅ fast ionic conductors
Authors: Kumar, Parveen
Tiwari, J P
Shahi, K
Keywords: Mechanically-milled
Jonscher power law
Fast ionic conductors
Issue Date: Jan-2007
Publisher: CSIR
Series/Report no.: G01R
Abstract: The structural and electrical characterizations of mechanically-milled (MM) amorphous fast ionic conductors (a-FICs), viz. xAgI (100-x)[0.67 Ag₂O-0.33V₂O₅] ( x = 40, 50, 55 and 70 ) have been reported. The amorphisation is restricted only to the compositions which are well within the glass forming region and all samples are found to be highly agglomerated and X-ray amorphous in nature. The frequency dependent ac conductivity , , of the amorphous samples investigated in the frequency range 5Hz -13 MHz and temperature range 100- 350 K shows a dc conductivity regime at low frequencies and a dispersive regime at higher frequencies. The spectra can be described by the Jonscher power law (JPL), However, the values σ dc(T) and A(T) both show two distinct Arrhenius regions and n ( < 1 ) is found to be temperature dependent, i.e., decreasing with increasing temperature.
Description: 44-47
ISSN: 0019-5596
Appears in Collections:IJPAP Vol.45(01) [January 2007]

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