Invention Grant
US08305281B2 Core-shell magnetic material, method of manufacturing core-shell magnetic material, device, and antenna device
有权
核 - 壳磁性材料,核 - 壳磁性材料的制造方法,器件和天线装置
- Patent Title: Core-shell magnetic material, method of manufacturing core-shell magnetic material, device, and antenna device
- Patent Title (中): 核 - 壳磁性材料,核 - 壳磁性材料的制造方法,器件和天线装置
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Application No.: US12412249Application Date: 2009-03-26
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Publication No.: US08305281B2Publication Date: 2012-11-06
- Inventor: Tomohiro Suetsuna , Kouichi Harada , Maki Yonetsu , Seiichi Suenaga
- Applicant: Tomohiro Suetsuna , Kouichi Harada , Maki Yonetsu , Seiichi Suenaga
- Applicant Address: JP Tokyo
- Assignee: Kabushiki Kaisha Toshiba
- Current Assignee: Kabushiki Kaisha Toshiba
- Current Assignee Address: JP Tokyo
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2008-229296 20080908
- Main IPC: H01Q1/00
- IPC: H01Q1/00

Abstract:
The present invention provides a core-shell magnetic material having an excellent characteristic in a high frequency band, particularly, in a GHz band. The core-shell magnetic material includes: core-shell magnetic particles including magnetic metal particles and an oxide coating layer, the magnetic metal particle containing magnetic metal selected from the group of Fe, Co, and Ni, nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and an element selected from carbon and nitrogen, and the oxide coating layer being made of an oxide containing at least one nonmagnetic metal as one of the components of the magnetic metal particle; and oxide particles existing at least a part between the magnetic metal particles and containing nonmagnetic metal selected from the group of Mg, Al, Si, Ca, Zr, Ti, Hf, Zn, Mn, a rare-earth element, Ba, and Sr, and in which nonmagnetic metal/magnetic metal (atomic ratio) in the particles is higher than that in the oxide coating layer.
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