Hopping conduction and polaron relaxation in Dy0.55Sr0.45Mn0.8Fe0.2O3

Hopping conduction and polaron relaxation in Dy0.55Sr0.45Mn0.8Fe0.2O3

Frequency dependent dielectric properties of orthorhombic rare earth manganite; Dy0.55Sr0.45Mn0.8Fe0.2O3 at various temperatures revealed multiple relaxation times indicating non-Debye model. Analysis of ac conductivity data showed three dimensional Variable Range Hopping (VRH) type of conduction at...

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Bibliographische Detailangaben
Hauptverfasser: Yadagiri, K., Nithya, R.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Current carriers
Dielectric properties
Dielectric relaxation
Grain boundaries
Hopping conduction
Low temperature
Nyquist plots
Specific heat
Three dimensional models
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Zusammenfassung:Frequency dependent dielectric properties of orthorhombic rare earth manganite; Dy0.55Sr0.45Mn0.8Fe0.2O3 at various temperatures revealed multiple relaxation times indicating non-Debye model. Analysis of ac conductivity data showed three dimensional Variable Range Hopping (VRH) type of conduction at low temperatures. Nyquist diagrams displayed depressed semi circles pointing to inhomogeneities in the system where conductivity is influenced by multivalent charge carriers, grains and grain boundaries.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0017659