Title:
磁気記録媒体
Document Type and Number:
Japanese Patent JP6707061
Kind Code:
B2
Abstract:
The magnetic recording medium includes a magnetic layer which contains ferromagnetic hexagonal ferrite powder and a binder, in which the magnetic layer contains an abrasive and a fatty acid ester, Int (110)/Int (114) of a crystal structure of the hexagonal ferrite, determined by performing XRD analysis on the magnetic layer by using an In-Plane method, is equal to or higher than 0.5 and equal to or lower than 4.0, a squareness ratio of the magnetic recording medium in a vertical direction is equal to or higher than 0.65 and equal to or lower than 1.00, FWHMbefore and FWHMafter is greater than 0 nm and equal to or smaller than 7.0 nm, and a difference between spacings measured within a surface of the magnetic layer by an optical interference method before and after the heating in a vacuum is greater than 0 nm and equal to or smaller than 8.0 nm.
Inventors:
Eki Ozawa
Kasada Adult
Toshio Tada
Kurokawa Takuto
Kasada Adult
Toshio Tada
Kurokawa Takuto
Application Number:
JP2017140025A
Publication Date:
June 10, 2020
Filing Date:
July 19, 2017
Export Citation:
Assignee:
FUJIFILM Corporation
International Classes:
G11B5/70; G11B5/706; G11B5/708; G11B5/71; G11B5/735; G11B5/738; G11B5/78
Domestic Patent References:
| JP2017068893A | ||||
| JP2012203955A | ||||
| JP2006236399A | ||||
| JP6020254A |
Foreign References:
| WO2015198514A1 |
Attorney, Agent or Firm:
Patent Service Corporation Patent Office Sykes