Structural and electrical properties of multiferroic YMnO3 and YMn0.9Cr0.06Ni0.04O3

In the present work polycrystalline yttrium manganite YMnO3 and YMn0.9Cr0.06Ni0.04O3 have been prepared by sol-gel auto combustion method. Investigations have been carried out on the structural and electrical properties of the prepared samples to study the effect of Cr3+ and Ni2+ ions substitution a...

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Bibliographic Details
Main Authors: Chanu, Lisham Paris, Phanjoubam, Sumitra
Format: Conference Proceeding
Language:English
Subjects:
Crystallites
Dielectric loss
Diffraction patterns
Electrical properties
Electrical resistivity
Grain size
Hexagonal phase
Manganese
Nickel
Orthorhombic phase
Phase transitions
Polycrystals
Room temperature
Sol-gel processes
Substitutes
Yttrium
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Summary:In the present work polycrystalline yttrium manganite YMnO3 and YMn0.9Cr0.06Ni0.04O3 have been prepared by sol-gel auto combustion method. Investigations have been carried out on the structural and electrical properties of the prepared samples to study the effect of Cr3+ and Ni2+ ions substitution at Mn-site. The X-ray diffraction (XRD) pattern confirms the formation of single hexagonal phase for YMnO3 and transition to orthorhombic phase with substitution. The crystallite size and grain size, as calculated from the Scherrer’s formula and field effect scanning electron microscope (FESEM) respectively, are found to be larger in the substituted samples. The room temperature dielectric constant and dielectric loss as function of frequency from 100Hz to 1MHz have been studied. The result shows the usual dispersive nature of polycrystalline materials. AC conductivity of the samples are also studied and fitted with Jonscher's Universal power law. The results obtained are discussed.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0016671