aDepartment of Physics, Indian Institute of Technology, New Delhi 110016, India
bBirla Institute of Technology & Science, Goa Campus, Zuari Nagar 403726, Goa, India
cNetaji Subhas Institute of Technology, Dwarka, New Delhi 110045, India
Abstract:
Manganese-substituted nickel–zinc ferrites have been investigated as power core materials for applications in switched-mode-power supplies. High frequency operation of these power supplies requires high performance cores with low power losses. The main contributors to the power loss are eddy current loss, hysteresis loss and residual loss. The ferrites have been synthesized by the citrate precursor technique and their electromagnetic properties such as resistivity, permeability, saturation magnetization and Curie temperature studied. A power loss of 500 mW/cc could be obtained at a frequency of 500 kHz, flux density of 50 mT and temperature 100 °C.