| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Phase Transformations in Ceramics: Science and Applications
|
| Presentation Title |
Nanostructured Spinel Ferrite Ceramics: Structure and Magnetic Properties |
| Author(s) |
Suraj V. Mullurkara, Y. Wang, A. Talaat , W. Xiong, J.K. Lee, P.R. Ohodnicki |
| On-Site Speaker (Planned) |
Suraj V. Mullurkara |
| Abstract Scope |
Nanostructuring of bulk Co-Fe-O spinel ferrites via spinodal decomposition is known to have an impact on magnetic behavior through nm-scale microstructural fluctuations in chemical composition and local stress. In this work, we explore effects of decomposition in bulk Co-Fe spinel ferrite. Thermodynamic calculations are presented using Thermo-Calc based databases and analytical modeling techniques. Traditional powder processing techniques including planetary ball milling followed by calcination and thermal annealing were used to produce spinodally decomposed cobalt ferrite. Structural characterization is performed using x-ray diffraction and vibrating sample magnetometry was utilized to study effects of decomposition on magnetic properties including First order reversal curve (FORC) analysis. Finally, M-H loop measurements combined with FORC distributions were used to investigate the dominant magnetic interactions and reversal mechanisms in the material. |