Invention Application
- Patent Title: HEXAGONAL FERRITE MAGNETIC POWDER AND MAGNETIC RECORDING MEDIUM
- Patent Title (中): 六角形铁磁粉和磁记录介质
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Application No.: US14223139Application Date: 2014-03-24
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Publication No.: US20140287270A1Publication Date: 2014-09-25
- Inventor: Hiroyuki SUZUKI , Toshio TADA
- Applicant: FUJIFILM CORPORATION
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM CORPORATION
- Current Assignee: FUJIFILM CORPORATION
- Current Assignee Address: JP Tokyo
- Priority: JP2013-062332 20130325
- Main IPC: G11B5/706
- IPC: G11B5/706
Abstract:
An aspect of the present invention relates to hexagonal ferrite magnetic powder, which has an activation volume ranging from 900 nm3 to 1,600 nm3, and a ratio of a coefficient of plate thickness variation to a coefficient of particle diameter variation, coefficient of plate thickness variation/coefficient of particle diameter coefficient, ranging from 0.20 to 0.60.
Public/Granted literature
- US09251832B2 Hexagonal ferrite magnetic powder and magnetic recording medium Public/Granted day:2016-02-02
Information query
IPC分类:
