학술논문
Fe系微細結晶材料の磁場中熱処理による磁気特性及び信頼性 / Magnetic Properties and Reliability of Fe-Based Nano-crystalline Materials by Heat Treatment in Magnetic Field
Document Type
Journal Article
Author
Source
日本磁気学会論文特集号 / Transaction of the Magnetics Society of Japan Special Issues. 2022, 6(1):10
Subject
Language
Japanese
ISSN
2432-0471
Abstract
Nanocrystalline Fe-Si-B-Nb-Cu alloy ribbons were annealed in the magnetic field of 400 kA/m applied in the width direction of the ribbon to investigate the magnetic properties and structure. Induced magnetic anisotropy was obtained at all temperatures in the heat treatment range from 460 ˚C to 660 ˚C. The best magnetic properties were obtained in the high frequency region above 100 kHz in the magnetic field heat treatment at 550 ˚C. The relative permeability μr at 500 kHz was 9000. Magnetic core loss was very low value of 180 kW/m3 at 100 kHz after magnetic field annealing. The generated crystals had the structure of αFe (Si) and the grain size was 13 nm. It was also found that the induced magnetic anisotropy imparted to the core by the magnetic field heat treatment at 550 ˚C was maintained in an environmental test.