English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Polycrystalline Yb substituted NiZn nanoferrites with the compositions ofNi0.5Zn0.5YbxFe2-xO4 (x= 0.00, 0.04, 0.08, 0.12, 0.16 and 0.20) have beensynthesized using sol gel auto combustion technique. Single phase cubic spinelstructure has been confirmed by the X ray diffraction (XRD) patterns. Largerlattice constants of the compositions are found with increasing Yb3+concentration while the average grain size (52 to 18 nm) has noticeabledecrease as Yb3+ content is increased. The presence of all existing elements aswell as the purity of the samples has also been confirmed from energydispersive X ray spectroscopic (EDS) analysis. Frequency dependent dielectricconstant, dielectric loss, dielectric relaxation time, AC and DC resistivity ofthe compositions have also been examined at room temperature. The DCresistivity value is found in the order of 10 to power 10 (omega-cm) which isat least four orders greater than the ferrites prepared by conventional method.This larger value of resistivity attributes due to very small grain size andsuccessfully explained using the Verwey and deBoer hopping conduction model.The contribution of grain and grain boundary resistance has been elucidatedusing Cole Cole plot. The study of temperature dependent DC resistivityconfirms the semiconducting nature of all titled compositions wherein bandgap(optical) increases from 2.73 eV to 3.25 eV with the increase of Yb content.The high value of resistivity is of notable achievement for the compositionsthat make them a potential candidate for implication in the high frequencyapplications where reduction of eddy current loss is highly required.

Influence of Yb3+on the structural, electrical and optical properties of sol-gel synthesized Ni-Zn nanoferrites