Perpendicular recording media with sublayers of oxide dopant magnetic materials
View Patent ↗Perpendicular recording media with sublayers of dual oxide dopant magnetic materials are disclosed. The magnetic layer may comprise multiple sublayers of magnetic materials. In each sublayer, dual oxide dopants are incorporated. The compositions of the sublayers can be the same or different depending on the application. The magnetic layer may be deposited using a target comprising a mixture of CoPtCrB and dual oxides as dopants. The layer deposited with such targets can be the entire magnetic layer or a sublayer.
1. A perpendicular recording media, comprising:
a substrate;
an adhesion layer adjacent the substrate;
at least one soft underlayer (SUL) on the adhesion layer;
at least one seed layer on said at least one SUL;
at least one underlayer on said at least seed layer;
at least two sublayers of dual oxide dopant magnetic materials of a magnetic recording layer on the at least one underlayer; and
said at least two sublayers of dual oxide dopant magnetic materials comprise B and both of Ta 2 O 5 and SiO 2 , B comprises a range of about 1 to 5 atomic percent, Ta 2 O 5 comprises a range of about 0.5 to 3 molecular percent, and SiO 2 comprises a range of about 3 to 8 molecular percent.
2. A perpendicular recording media according to claim 1 , wherein said at least two sublayers of dual oxide dopant magnetic materials comprise a same composition.
3. A perpendicular recording media according to claim 1 , wherein said at least two sublayers of dual oxide dopant magnetic materials comprise different compositions.
4. A perpendicular recording media according to claim 1 , wherein said at least two sublayers of dual oxide dopant magnetic materials comprise CoPt 18 Cr 17 B 3 -1(Ta 2 O 5 )-5(SiO 2 ).
5. A perpendicular recording media according to claim 1 , wherein each of said at least two sublayers of dual oxide dopant magnetic materials comprises CoPt 18 Cr 17 B 3 -1(Ta 2 O 5 ) -5(SiO 2 ).
6. A perpendicular recording media according to claim 1 , wherein at least a portion of said at least two sublayers of dual oxide dopant magnetic materials is sputter-deposited.
7. A perpendicular recording media according to claim 1 , wherein each of said at least two sublayers of dual oxide dopant magnetic materials is sputter-deposited.
8. A perpendicular recording media according to claim 1 , wherein said at least two sublayers of dual oxide dopant magnetic materials comprise CoPt 18 Cr 18 -1(Ta 2 O 5 )-5(SiO 2 ).
9. A perpendicular recording media according to claim 1 , further comprising:
an exchange control layer (ECL) on one of said at least two dual oxide dopant magnetic materials;
a layer of CoPtCrB on the ECL; and
a carbon overcoat on the CoPtCrB layer.
10. A perpendicular recording media according to claim 1 , wherein the SUL comprises a pair of SULs and a Ru layer therebetween, and the at least one seed layer comprises a pair of seed layers.
11. A perpendicular recording media according to claim 1 , wherein the at least one underlayer comprises three underlayers.
12. A perpendicular recording media, comprising:
a substrate;
an adhesion layer on the substrate;
at least one soft underlayer (SUL) on the adhesion layer;
at least one seed layer on said at least one SUL;
at least one underlayer on said at least seed layer;
at least two sublayers of dual oxide dopant magnetic materials of a magnetic recording layer on the at least one underlayer, wherein said at least two sublayers of dual oxide dopant magnetic materials comprise CoPt 18 Cr 18 -1(Ta 2 O 5 )-5(SiO 2 );
an exchange control layer (ECL) on one of said at least two dual oxide dopant magnetic materials;
a layer of CoPtCrB on the ECL, wherein B comprises a range of about 1 to 5 atomic percent; and
a carbon overcoat on the CoPtCrB layer.
13. A perpendicular recording media according to claim 12 , wherein said at least two sublayers of dual oxide dopant magnetic materials comprise a same composition.
14. A perpendicular recording media according to claim 12 , wherein the at least one SUL comprises a pair of SULs and a Ru layer therebetween, the at least one seed layer comprises a pair of seed layers, and the at least one underlayer comprises three underlayers.
15. A hard disk drive, comprising:
a magnetic media comprising:
a substrate;
an adhesion layer on the substrate;
at least one soft underlayer (SUL) on the adhesion layer;
at least one seed layer on said at least one SUL;
at least one underlayer on said at least seed layer;
at least two sublayers of dual oxide dopant magnetic materials of a magnetic recording layer on the at least one underlayer, at least one of said at least two sublayers of dual oxide dopant magnetic materials comprise B and both of Ta 2 O 5 and SiO 2 , wherein B comprises a range of about 1 to 5 atomic percent, Ta 2 O 5 comprises a range of about 0.5 to 3 molecular percent, and SiO 2 comprises a range of about 3 to 8 molecular percent; and
an actuator movable relative to the magnetic media and having a read head for reading data from the magnetic media.
16. A hard disk drive according to claim 15 , wherein said at least two sublayers of dual oxide dopant magnetic materials comprise one of a same composition and different compositions.
17. A hard disk drive according to claim 15 , wherein each of said at least two sublayers of dual oxide dopant magnetic materials comprises CoPt 18 Cr 17 B 3 -1(Ta 2 O 5 )-5(SiO 2 ).
18. A hard disk drive according to claim 15 , further comprising:
an exchange control layer (ECL) on one of said at least two dual oxide dopant magnetic materials of the magnetic recording layer;
a layer of CoPtCrB on the ECL; and
a carbon overcoat on the CoPtCrB layer; and wherein
the SUL comprises a pair of SULs and a Ru layer therebetween, the at least one seed layer comprises a pair of seed layers, and the at least one underlayer comprises three underlayers.