MAGNETIC RECORDING MEDIUM

• US 20190035424A1
• Filed: 12/14/2016
• Published: 01/31/2019
• Est. Priority Date: 01/15/2016
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: ENDO, Tetsuo
• Granted Patent: US 11,361,790 B2
• Time in Patent Office: Days
• CPC Class Codes: G11B 5/00813 magnetic tapes
• CPC Class Codes: G11B 5/70605 metals or alloys
• CPC Class Codes: G11B 5/7363 Non-magnetic single underlayer comprising nickel
• CPC Class Codes: G11B 5/7368 Non-polymeric layer under the lowermost magnetic recording layer base layers having a non-magnetic layer under a soft magnetic layer G11B5/736; magnetic recording media substrates G11B5/739
• CPC Class Codes: G11B 5/7369 Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
• CPC Class Codes: G11B 5/7371 Non-magnetic single underlayer comprising nickel
• CPC Class Codes: G11B 5/78 Tape carriers

Abstract

A magnetic recording medium includes: a substrate; a recording layer; and a layer being provided between the substrate and the recording layer, the layer containing a superelastic body.

Claims

1. A magnetic recording medium comprising:

a substrate;

a recording layer; and

a layer being provided between the substrate and the recording layer, the layer containing a superelastic body.

2. The magnetic recording medium according to claim 1, wherein the substrate is an elongated substrate having flexibility.

3. The magnetic recording medium according to claim 1, wherein the superelastic body is a superelastic alloy.

4. The magnetic recording medium according to claim 3, wherein the superelastic alloy contains Ti and Ni.

5. The magnetic recording medium according to claim 1, further comprising a crystal control layer provided between the layer containing the superelastic body and the recording layer.

6. The magnetic recording medium according to claim 1, further comprising a soft magnetic layer provided between the layer containing the superelastic body and the recording layer.

7. The magnetic recording medium according to claim 6, wherein the soft magnetic layer includes a first soft magnetic layer, an intermediate layer, and a second soft magnetic layer.

8. The magnetic recording medium according to claim 1, wherein the recording layer is a perpendicular recording layer.

9. The magnetic recording medium according to claim 8, wherein the perpendicular recording layer contains Co, Pt, and Cr and has a granular structure.

10. The magnetic recording medium according to claim 1, wherein the recording layer contains a magnetic powder and a binder.