Magnetic tape and method of manufacturing the same
US-2016093323-A1 · Mar 31, 2016 · US
Magnetic tape device and magnetic reproducing method
US10403317B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10403317-B2 |
| Application number | US-201815920538-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 14, 2018 |
| Priority date | Mar 29, 2017 |
| Publication date | Sep 3, 2019 |
| Grant date | Sep 3, 2019 |
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Abstract
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The magnetic tape device includes a magnetic tape and a TMR head, in which the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, an intensity ratio of a peak intensity Int(110) of a diffraction peak of a (110) plane with respect to a peak intensity Int(114) of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, and a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00.
First claim
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What is claimed is: 1. A magnetic tape device comprising: a magnetic tape; and a reproducing head, wherein the reproducing head is a magnetic head including a tunnel magnetoresistance effect type element as a reproducing element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, an intensity ratio Int(110)/Int(114) of a peak intensity Int(110) of a diffraction peak of a (110) plane with respect to a peak intensity Int(114) of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, and a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00. 2. The magnetic tape device according to claim 1 , wherein the vertical direction squareness ratio of the magnetic tape is 0.65 to 0.90. 3. The magnetic tape device according to claim 1 , wherein a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.5 nm. 4. The magnetic tape device according to claim 1 , wherein the magnetic tape includes a non-magnetic layer including non-magnetic powder and a binding agent between the non-magnetic support and the magnetic layer. 5. A magnetic reproducing method comprising: reproducing information recorded on a magnetic tape by a reproducing head, wherein the reproducing head is a magnetic head including a tunnel magnetoresistance effect type element as a reproducing element, the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, an intensity ratio Int(110)/Int(114) of a peak intensity Int(110) of a diffraction peak of a (110) plane with respect to a peak intensity Int(114) of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, and a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00. 6. The magnetic reproducing method according to claim 5 , wherein the vertical direction squareness ratio of the magnetic tape is 0.65 to 0.90. 7. The magnetic reproducing method according to claim 5 , wherein a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.5 nm. 8. The magnetic reproducing method according to claim 5 , wherein the magnetic tape includes a non-magnetic layer including non-magnetic powder and a binding agent between the non-magnetic support and the magnetic layer.
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- What does patent US10403317B2 cover?
- The magnetic tape device includes a magnetic tape and a TMR head, in which the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, an intensity ratio of a peak intensity Int(110) of a diffraction peak of a (110) plane with respect to…
- Who is the assignee on this patent?
- Fujifilm Corp
- What technology area does this patent fall under?
- Primary CPC classification G11B5/82. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 03 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 12 related publications on this page (citations in our corpus or others sharing the same primary CPC).