Article ID Journal Published Year Pages File Type
5460366 Journal of Alloys and Compounds 2017 22 Pages PDF
Abstract
This study demonstrates the temperature dependent (carried out at 5, 150 and 300 K) magnetic properties of Zr4+ and Ti+4 substituted cobalt ferrite samples and their comparison. Polycrystalline Co1+xTxFe2−2xO4 (0 ≤ x ≤ 0.4 and T = Zr, Ti) series of compositions were prepared by conventional ceramic method. X-ray diffraction (XRD) confirmed the single phase cubic spinel structure, except for x = 0.4 composition. Coercivity (Hc) is observed to increase substantially with decrease in temperature for all Zr and Ti substituted samples. The magnetization and magnetocrystalline anisotropy constant (K1) were observed to peak at ∼150 K for both the series of samples. Field sensitivity of magnetization (dM/dH) increased with progressive Zr and Ti substitutions. Curie temperature of Co1.2Zr0.2Fe1.6O4 and Co1.2Ti0.2Fe1.6O4 samples (∼445 °C and 472 °C respectively) decreased compared to that of pure cobalt ferrite (∼517 °C).
Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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