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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
S. Supriya, S. Kumar, L. K. Pradhan, R. Pandey and M. Kar 
Corresponding Authors:
Manoranjan Kar 
DOI #:
https://doi.org/10.1142/S0217979218503587 
Title:
Multiple electrical phase transitions in nanocrystalline aluminium-substituted cobalt ferrite 
Journal:
International Journal of Modern Physics B 
Year:
2018 
Volume:
32 
Page:
1850358 
Keywords:
Cobalt ferrite, impedance, dielectric, grain, grain boundary 
Abstract:
Electrical properties of a series of nanocrystalline aluminium-substituted cobalt ferrite CoAlxxFe2−x2−xO4 (CAFO) with x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5 have been explored. The electrical parameters have been measured by employing impedance and techniques. The impedance has measured as a function of frequency and temperature for all the samples. The impedance increases with the increase in Al concentration in CAFO. Cobalt ferrite is yet to be verified as a ferroelectric material. However, the electrical properties reported here are similar to conventional ferroelectric materials. Multiple (two) electrical phase transitions have been observed, the two transition temperatures are identified as TDD and TMM i.e., one is dipole relaxation transition (TDD) and other one is electrical phase transition temperature. Both AC and DC measurements indicate the transition temperatures. 
Entered by:
Venkata Dantham on 2020-08-02 
 
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