Claims
- 1. A magnetic recording medium having a nonmagnetic substrate on which is provided at least a softly magnetic under-film, an orientation control film that controls an orientation of a film directly above, a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate, and a protective film, wherein the orientation control film is alloy containing at least Cr and C.
- 2. The magnetic recording medium according to claim 1, wherein the orientation control film has a C content that is not less than 10 at % and not more than 80 at %.
- 3. The magnetic recording medium according to claim 1, wherein the orientation control film has a C content that is not less than 30 at % and not more than 70 at %.
- 4. The magnetic recording medium according to claim 1, wherein the orientation control film has a Cr content that is not less than 3 at % and not more than 80 at %.
- 5. The magnetic recording medium according to claim 1, wherein the orientation control film has a thickness that is not less than 0.5 nm and not more than 20 nm.
- 6. The magnetic recording medium according to claim 2, wherein the orientation control film has a thickness that is not less than 0.5 nm and not more than 20 nm.
- 7. The magnetic recording medium according to claim 1, wherein the perpendicular magnetic recording film is formed of a material containing at least Co and Pt.
- 8. The magnetic recording medium according to claim 2, wherein the perpendicular magnetic recording film is formed of a material containing at least Co and Pt.
- 9. A method of manufacturing the magnetic recording medium according to claim 1, comprising carrying out, in order, at least a step of forming a softly magnetic under-film on a nonmagnetic substrate, a step of forming an orientation control film that controls an orientation of a film directly above, a step of forming a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate, and a step of forming a protective film.
- 10. A method of manufacturing the magnetic recording medium according to claim 2, comprising carrying out, in order, at least a step of forming a softly magnetic under-film on a nonmagnetic substrate, a step of forming an orientation control film that controls an orientation of a film directly above, a step of forming a perpendicular magnetic recording film having an axis of easy magnetization oriented to be mainly perpendicular to the substrate, and a step of forming a protective film.
- 11. A magnetic recording and reproduction apparatus comprising the magnetic recording medium according to claim 1 and a magnetic head that records and reproduces information on the magnetic recording medium, wherein the magnetic head is a magnetic monopole head.
- 12. A magnetic recording and reproduction apparatus comprising the magnetic recording medium according to claim 2 and a magnetic head that records and reproduces information on the magnetic recording medium, wherein the magnetic head is a magnetic monopole head.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2002-223199 |
Jul 2002 |
JP |
|
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application is an application filed under 35 U.S.C. §111(a) claiming the benefit pursuant to 35 U.S.C. §119(e) (1) of the filing date of Provisional Application No. 60/401,037 filed Aug. 6, 2002 pursuant to 35 U.S.C. §111(b).
Provisional Applications (1)
|
Number |
Date |
Country |
|
60401037 |
Aug 2002 |
US |