JP2018106795A5 - - Google Patents
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- JP2018106795A5 JP2018106795A5 JP2018070785A JP2018070785A JP2018106795A5 JP 2018106795 A5 JP2018106795 A5 JP 2018106795A5 JP 2018070785 A JP2018070785 A JP 2018070785A JP 2018070785 A JP2018070785 A JP 2018070785A JP 2018106795 A5 JP2018106795 A5 JP 2018106795A5
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- JP
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- Prior art keywords
- magnetic
- recording medium
- medium according
- magnetic recording
- less
- Prior art date
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- 239000006247 magnetic powder Substances 0.000 claims description 11
- 230000005415 magnetization Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims 4
- 241000271571 Dromaius novaehollandiae Species 0.000 claims 3
- 230000002269 spontaneous Effects 0.000 claims 2
- 229910052782 aluminium Inorganic materials 0.000 claims 1
- 229910052733 gallium Inorganic materials 0.000 claims 1
- 229910052738 indium Inorganic materials 0.000 claims 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims 1
- 229910000460 iron oxide Inorganic materials 0.000 claims 1
- 230000005641 tunneling Effects 0.000 claims 1
Description
上述の課題を解決するために、本技術は、
非磁性支持体と、
磁性粉末を含む磁性層と
を備え、
磁性粉末は、ε−Ｆｅ2Ｏ3結晶（Ｆｅサイトの一部が金属元素Ｍで置換されたもの
を含む）を含み、
垂直方向に測定した磁性層の残留磁化と厚さとの積が、０．５ｍＡ以上６．０ｍＡ以下であり、
磁性層の厚みが、３０ｎｍ以上１００ｎｍ以下である磁気記録媒体である。
In order to solve the above problems, the present technology
A non-magnetic support;
A magnetic layer containing magnetic powder, and
The magnetic powder includes ε-Fe 2 O 3 crystals (including those in which part of the Fe site is replaced with the metal element M),
The product of the remanent magnetization and thickness of the magnetic layer measured in the vertical direction is not less than 0.5 mA and not more than 6.0 mA;
The magnetic recording medium has a magnetic layer having a thickness of 30 nm to 100 nm .
Claims (15)
磁性粉末を含む磁性層と
を備え、
上記磁性粉末は、ε−Ｆｅ2Ｏ3結晶（Ｆｅサイトの一部が金属元素Ｍで置換されたものを含む）を含み、
垂直方向に測定した上記磁性層の残留磁化と厚さとの積が、０．５ｍＡ以上６．０ｍＡ以下であり、
上記磁性層の厚みが、３０ｎｍ以上１００ｎｍ以下である磁気記録媒体。 A non-magnetic support;
A magnetic layer containing magnetic powder, and
The magnetic powder includes ε-Fe 2 O 3 crystals (including those in which part of the Fe site is replaced with the metal element M),
The product of the remanent magnetization and thickness of the magnetic layer measured in the vertical direction is 0.5 mA or more and 6.0 mA or less,
A magnetic recording medium in which the magnetic layer has a thickness of 30 nm to 100 nm .
鉄酸化物におけるＭとＦｅのモル比をＭ：Ｆｅ＝ｘ：（２−ｘ）と表すとき、０≦ｘ＜１である請求項１から１３のいずれかに記載の磁気記録媒体。14. The magnetic recording medium according to claim 1, wherein 0 ≦ x <1 when the molar ratio of M to Fe in the iron oxide is expressed as M: Fe = x: (2-x).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018070785A JP6508386B2 (en) | 2018-04-02 | 2018-04-02 | Magnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018070785A JP6508386B2 (en) | 2018-04-02 | 2018-04-02 | Magnetic recording medium |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2013219182A Division JP6318540B2 (en) | 2013-10-22 | 2013-10-22 | Magnetic recording medium |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2018106795A JP2018106795A (en) | 2018-07-05 |
| JP2018106795A5 true JP2018106795A5 (en) | 2019-01-24 |
| JP6508386B2 JP6508386B2 (en) | 2019-05-08 |
Family
ID=62785823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2018070785A Active JP6508386B2 (en) | 2018-04-02 | 2018-04-02 | Magnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6508386B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007294084A (en) * | 2006-03-31 | 2007-11-08 | Fujifilm Corp | Magnetic recording medium, magnetic signal reproduction system, and magnetic signal reproducing method |
| JP4728916B2 (en) * | 2006-08-31 | 2011-07-20 | 国立大学法人 東京大学 | Magnetic material |
| JP5315374B2 (en) * | 2011-03-25 | 2013-10-16 | 富士フイルム株式会社 | Magnetic tape, manufacturing method thereof, and magnetic recording apparatus |
-
2018
- 2018-04-02 JP JP2018070785A patent/JP6508386B2/en active Active
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