Title:
磁気記録媒体、イプシロン型酸化鉄粒子の製造方法、及び磁気記録媒体の製造方法
Document Type and Number:
Japanese Patent JP7023250
Kind Code:
B2
Abstract:
Embodiments include a magnetic recording medium containing ε-type iron oxide particles and having excellent SNR, a manufacturing method of ε-type iron oxide particles, and a manufacturing method of a magnetic recording medium. High SNR is achieved by a magnetic recording medium containing ε-type iron oxide particles, in which a coefficient of variation of an aspect ratio of the ε-type iron oxide particles is equal to or smaller than 18%, and a squareness ratio of the magnetic recording medium measured in a longitudinal direction of the magnetic recording medium is higher than 0.3 and equal to or lower than 0.5. The object is also achieved by the application of the magnetic recording medium.
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Inventors:
Takashi Fujimoto
Application Number:
JP2019035760A
Publication Date:
February 21, 2022
Filing Date:
February 28, 2019
Export Citation:
Assignee:
FUJIFILM Corporation
International Classes:
G11B5/706; C01G49/04; G11B5/70; G11B5/714; G11B5/84; G11B5/842; G11B5/852; H01F1/11
Domestic Patent References:
| JP2019003970A | ||||
| JP2005222604A | ||||
| JP7210852A | ||||
| JP6318540B2 |
Foreign References:
| WO2015198514A1 | ||||
| WO2018062478A1 |
Attorney, Agent or Firm:
Patent Service Corporation Taiyo International Patent Office