High performance NiZn ferrite

• Published in: IEEE transactions on magnetics Vol. 37; no. 4; pp. 2359 - 2361
• Main Authors: Matsuo, Y., Inagaki, M., Tomozawa, T., Nakao, F.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-07-2001; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Coercive force; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Core loss; Crystal structure; DC-DC power converters; Exact sciences and technology; Fe and its alloys; Ferrite; Ferrites; Hysteresis losses; Inductors; Lattice strain; Lattices; Magnetic cores; Magnetic field induced strain; Magnetic hysteresis; Magnetic properties; Magnetic properties and materials; Magnetism; Optimization; Physics; Studies of specific magnetic materials; Ferrites; Zinc compounds; Manganese oxides; Lattice distortion; Ferromagnetic materials; Nickel compounds; Oxides; XRD; Experimental study; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/20.951172

High-performance NiZn ferrite was developed for use in mini DC-DC converters and inductors. In the development process, attention was focused on a small amount of MnO/sub 2/ contained in NiZn ferrite. The quantity of MnO/sub 2/ was examined as to its effects on the crystal structure and magnetic properties of NiZn ferrite cores. It was confirmed that core loss can be reduced by optimizing the MnO/sub 2/ content. This was attributed to the decrease of lattice strain in the crystal structure of the core by a change in MnO/sub 2/ content, which causes a chain reaction of a coercive force decline and then a hysteresis loss decline. As a result, we were able to develop a top class low-loss NiZn ferrite.