| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Magnetic Materials for Sensors, Power, and Multifunctional Applications
|
| Presentation Title |
Investigation of Magnetic Behaviour of Spinel Ferrites using First Order Reversal Curves (FORC) |
| Author(s) |
Suraj V. Mullurkara, Ahmed Talaat , Brad Dodrill, Paul R. Ohodnicki |
| On-Site Speaker (Planned) |
Suraj V. Mullurkara |
| Abstract Scope |
Transition metal spinel ferrites are known for unique magnetic properties which depend sensitively upon cation chemistry, site occupation, and microstructure. For example, the cobalt ferrites have been shown to undergo spinodal decomposition resulting in nano structuring at very fine length scales. The resultant magnetic properties have been shown to dependent on the degree of decomposition. MnZn-ferrites are preferred soft magnetic materials for power electronic applications over frequencies ranging from ~100 kHz to 5 MHz primarily due to their higher resistivities which results in the suppression of eddy current losses. However, in Mn-Zn ferrites hysteretic losses dominate under quasistatic and low frequency conditions, but can also play an important role under high frequency excitation. In this work, ferrite samples will be synthesized using standard powder processing techniques and characterized using XRD and SEM. Magnetization processes occurring in these materials will be investigated through vibrating sample magnetometry using major M-H loops and temperature dependant magnetization. In addition to major M-H loops, first order reversal curves (FORC) measurements will also be utilized to further elucidate dominant magnetization reversal mechanisms. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Magnetic Materials, Ceramics, Other |