Development of low loss Mn-Zn ferrite working at frequency higher than 3 MHz

With the advance of modern electronic technology, there has been a critical need for Mn-Zn ferrites with even higher permeability and even lower power loss at higher frequencies. In this study, ferrite with extremely low losses than conventional ferrite materials at high frequency was developed employing a conventional ceramic powder processing technique. As a result, the core loss at 3 MHz, 10 mT and 100 degrees C is around 300 kW/m(3), and its cutoff frequency is 4 MHz. Furthermore, the electromagnetic characteristics and the microstructure of this new DMR50 material are also discussed. (C) 2008 Elsevier B.V. All rights reserved.