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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Materials Engineering of Soft Magnets for Power and Energy Applications
Presentation Title Study of Temperature Dependent Magnetic Properties of Zr+4 and Ti+4 Substituted Cobalt Ferrites
Author(s) Monaji Vinitha Reddy, Sudhindra Rayaprol, Shara Sowmya, A. Srinivas, Dibakar Das
On-Site Speaker (Planned) Dibakar Das
Abstract Scope Substituted cobalt ferrites (CFO) have attracted research attention because of their potential for contactless stress sensing applications. This study demonstrates the variation in magnetic properties of Zr4+ and Ti+4 substituted cobalt ferrites under varying temperatures (5, 150 and 300K) and the results were compared. Polycrystalline Co1+xZrxFe2−2xO4 (CZFO) and Co1+xTixFe2−2xO4 (CTFO) (0 ≤ x ≤ 0.4) samples were prepared by conventional ceramic method. X-ray diffraction (XRD) confirmed the single phase cubic spinel structures, except for x = 0.4 composition. The magnetization (Mmax) and coercivity (Hc) were observed to increase with decrease in temperatures for all CZFO and CTFO samples. The magnetocrystalline anisotropy constant (K1) was increased substantially with decreasing temperatures both for Zr and Ti substituted samples. Maximum differential susceptibility (χ) increased with progressive Zr and Ti substitutions but decreased with increasing temperatures. Curie temperatures of Co1.2Zr0.2Fe1.6O4 and Co1.2Ti0.2Fe1.6O4 samples (~ 729K and 745K respectively) decreased compared to pure CFO (~787K).
Proceedings Inclusion? Planned: Supplemental Proceedings volume


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