Influence of Al2O3 Addition on the Temperature Dependence of Initial Permeability of NiCuZn Ferrites

Shin Takane; Hidenobu Umeda; Takuya Aoki; Taku Murase

doi:10.4028/www.scientific.net/KEM.485.225

Paper Titles

Low-Loss Transmission Characteristics of Transparent Conductive Thin Films in GHz Range
p.207

Fabrication and Evaluation of Al₂O₃ Films Using the Aerosol Deposition Method
p.211

Planarization of Zinc Oxide Surface and Evaluation of Processing Damage
p.215

Magnetic Properties of Epitaxial NiFe₂O₄ Thin Films Prepared Using Dynamic Aurora PLD in a Magnetic Field
p.221

Influence of Al₂O₃ Addition on the Temperature Dependence of Initial Permeability of NiCuZn Ferrites
p.225

Composite Electromagnetic Wave Absorber Made of Ni-Zn Ferrite Particles Dispersed and Isolated in an SiO₂ Medium
p.229

Relationship between the Crystallinity and Magnetic Properties of Cr₂O₃/LiNbO₃/Cr₂O₃ Multi-Layer Materials
p.233

Electrical Properties of La(Cr,Mn)O₃ NTC Materials
p.237

Characterization of Grain Boundaries of Lead-Free Semiconducting Ceramics Using BaTiO₃-(Bi_1/2K_1/2)TiO₃ System
p.241

HomeKey Engineering MaterialsKey Engineering Materials Vol. 485Influence of Al2O3 Addition on the Temperature...

Influence of Al₂O₃ Addition on the Temperature Dependence of Initial Permeability of NiCuZn Ferrites

Abstract:

The effect of Al₂O₃ addition on the temperature dependence of the initial permeability and microstructure of NiCuZn ferrites is investigated. The temperature dependence of initial permeability decreases with an increase in Al₂O₃ addition. EPMA analysis reveals that Al₂O₃ dissolves in the NiCuZn ferrite grains but is not uniformly dispersed. Separation of the initial permeability into two components, one due to spin rotation and the other due to domain wall motion, reveals that with an increase in the Al₂O₃ addition, the temperature dependence of the domain wall motion component decreases, while that of the spin rotation component shows no notable change. This indicates that the decrease in the temperature dependence of initial permeability may be attributed to the influence of Al₂O₃ on the domain wall motion.

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Periodical:

Key Engineering Materials (Volume 485)

Pages:

225-228

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.485.225

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Online since:

July 2011

Authors:

Shin Takane, Hidenobu Umeda, Takuya Aoki, Taku Murase

Keywords:

Aluminium Oxide, Initial Permeability, Microstructure, NiCuZn Ferrite, Temperature Dependence of Initial Permeability

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