Low loss MnZn-ferrites: frequency dependence of minimum power loss temperature

• Published in: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Vol. 29; no. 6; pp. 3532 - 3534
• Main Authors: Inoue, O., Matsutani, N., Kugimiya, K.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.11.1993; Institute of Electrical and Electronics Engineers
• Subjects: 240200 > Power System Networks, Transmission & Distribution > (1990-); CHALCOGENIDES; Condensed matter: electronic structure, electrical, magnetic, and optical properties; DATA; Domain effects, magnetization curves, and hysteresis; DOMAIN STRUCTURE; Eddy currents; ELECTRIC CONDUCTIVITY; ELECTRICAL EQUIPMENT; ELECTRICAL PROPERTIES; ELECTRONIC EQUIPMENT; ENERGY LOSSES; Exact sciences and technology; EXPERIMENTAL DATA; Ferrites; Frequency dependence; INFORMATION; IRON COMPOUNDS; IRON OXIDES; LOSSES; Magnetic domain walls; Magnetic domains; Magnetic hysteresis; Magnetic losses; MAGNETIC PROPERTIES; Magnetic properties and materials; Magnetic resonance; Magnetic separation; Magnetization curves, hysteresis, Barkhausen and related effects; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; MANGANESE COMPOUNDS; MANGANESE OXIDES; MATERIALS SCIENCE; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; Physics; POWER SUPPLIES; POWER TRANSMISSION AND DISTRIBUTION; TEMPERATURE DEPENDENCE; TRANSITION ELEMENT COMPOUNDS; ZINC COMPOUNDS 360204 > Ceramics, Cermets, & Refractories > Physical Properties; ZINC OXIDES; Ferrites; Zinc oxides; Manganese oxides; Frequency; Iron oxides; Domain wall; AC losses; Quaternary compounds; Hysteresis; Foucault current
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/20.281220

A simple method was applied to separate magnetic loss into hysteresis loss, eddy current loss and residual loss. Residual loss becomes dominant at high frequency, and is assumed to be the main cause of the frequency dependence of the minimum loss temperature. The origin of the residual loss is thought to be domain wall resonance. Experiments along this hypothesis have led to new low loss ferrites with magnetic loss of less than 100 kW/m/sup 3/ at 1 MHz, 50 mT and 80 degrees C.< >