High B / μ MnZn ferrites for high Hc media

The MnZn ferrite family with Fe 2O 3 = 60–65 mol% has been studied in detail. Although | K 1 + λ sσ | ⪢ 0 ( K 1 = 0 and λ s⪢ 0), exceptionally good magnetic properties were obtained; namely high B s of 6300 G, B(10 Oe) of 6000 G, H c of 0.2 Oe, μ(10 kHz) of 1600 and μ(10 MHz) of 950 at room temperat...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 72; no. 3; pp. 275 - 278
Main Authors Kugimiya, K., Hirota, K., Satomi, M.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.04.1988
Elsevier Science
Subjects
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Magnetic properties and materials
Physics
Magnetization
Transition metal Compounds
Iron Manganese Zinc Oxides Mixed
Experimental study
Solid solution
Oxide ceramics
Inorganic compound
Ferrites spinels
Magnetic permeability
Preparation
Coercive force
Magnetic head
Chemical composition
Recording material
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Summary:The MnZn ferrite family with Fe 2O 3 = 60–65 mol% has been studied in detail. Although | K 1 + λ sσ | ⪢ 0 ( K 1 = 0 and λ s⪢ 0), exceptionally good magnetic properties were obtained; namely high B s of 6300 G, B(10 Oe) of 6000 G, H c of 0.2 Oe, μ(10 kHz) of 1600 and μ(10 MHz) of 950 at room temperature. Controlling the oxygen content of the starting fine powders with high reactivity and using optimum hot-pressing conditions resulted in dense sintered bodies (porosity < 0.003%) with a fine microstructure, and with a minimum excess oxygen trapped in pores. It also resulted in very small residual internal stress and thus superior magnitic properties.
ISSN:0304-8853
DOI:10.1016/0304-8853(88)90222-3