AC Conductivity and Dielectric Properties of TiCo Substituted Y-type Strontium Nano Hexa-ferrites Prepared by Sol Gel Auto-combustion

• Main Authors: Warhate, Vijay V., Badwaik, V.D., Badwaik, D.S.
• Format: Conference Proceeding
• Language: English
• Subjects: AC conductivity; Dielectric constant; Dielectric loss; Dielectric Polarization; Y-type nano hexaferrites
• ISSN: 2214-7853; 2214-7853
• DOI: 10.1016/j.matpr.2019.04.111

Six compounds of polycrystalline NiMn Y-type strontium nano-hexaferrites substituted with Ti4+Co2+, having chemical composition Sr2NiMnFe12-X(TiCo)X/2O22 (0 ≤ x ≤ 2.5 with a step of 0.5) were formed by sol-gel auto-combustion route through microwave and sintered at 950 0C for 5 hr. The grain size of the prepared sample (x=0.5) measured from Scherer formula is 62 nm. The frequency dependant ac conductivity, dielectric constant and tangent loss were measured at room temperature in the range 100Hz - 0.2 MHz by the LCR-Q meter. The carrier transfer mechanism between localized states in ferrites can be explained by Maxwell-Wagners suggested model of interfacial polarization and Koop’s phenomenological theory of dielectric. The dielectric measurements at different temperature were also carried out. Dielectric relaxation peak on tan δ (ω) curve is observed and discussed on the basis of dielectric polarization.