Granted Patent B1

US 8,658,292 · App. 13/157,676 · Granted Feb 25, 2014

Abstract

Claims (42)

1. A magnetic media structure for magnetic recording, the media structure comprising:

at least one base layer comprising:

an interlayer,

a bottom magnetic recording layer positioned on the interlayer, and

an exchange coupling layer positioned on the bottom layer; and

a capping magnetic recording layer positioned on the at least one base layer, the capping recording layer comprising a first material that increases a damping constant of the capping recording layer,

wherein the capping recording layer comprises a preselected quantity of a second material that increases the anisotropy field of the capping recording layer and thereby compensates for a reduction in the anisotropy field caused by the first material, and

wherein the preselected quantity is set to a level configured to return the anisotropy field of the capping recording layer to about a preselected level corresponding to a level of the anisotropy field when the capping recording layer does not include the first material.

2. A magnetic media structure for magnetic recording, the media structure comprising:

at least one base layer comprising:

an interlayer,

a bottom magnetic recording layer positioned on the interlayer, and

an exchange coupling layer positioned on the bottom layer; and

a capping magnetic recording layer positioned on the at least one base layer, the capping recording layer comprising a first material that increases a damping constant of the capping recording layer, and

wherein the at least one base layer comprises:

a middle magnetic recording layer comprising a third material configured to increase a damping constant of the middle layer to a third preselected level.

3. A magnetic media structure for magnetic recording, the media structure comprising:

at least one base layer comprising:

an interlayer,

a bottom magnetic recording layer positioned on the interlayer, and

an exchange coupling layer positioned on the bottom layer; and

a capping magnetic recording layer positioned on the at least one base layer, the capping recording layer comprising a first material that increases a damping constant of the capping recording layer, and

wherein the interlayer comprises Ru,

wherein the bottom recording layer comprises CoCrPt,

wherein the exchange coupling layer comprises Ru, and

wherein the capping recording layer comprises CoCrPtTb.

4. A magnetic media structure for magnetic recording, the media structure comprising:

at least one base layer comprising:

an interlayer,

a bottom magnetic recording layer positioned on the interlayer, and

an exchange coupling layer positioned on the bottom layer; and

a capping magnetic recording layer positioned on the at least one base layer, the capping recording layer comprising a first material that increases a damping constant of the capping recording layer, and

wherein the at least one base layer further comprises:

a middle magnetic recording layer positioned on the exchange coupling layer, and

a second exchange coupling layer positioned on the middle recording layer, and

wherein the capping recording layer is positioned on the second exchange coupling layer, and

wherein the interlayer comprises Ru,

wherein the bottom recording layer comprises CoCrPt,

wherein the exchange coupling layer comprises Ru,

wherein the middle recording layer comprises CoCrPt,

wherein the second exchange coupling layer comprises Ru, and

wherein the capping recording layer comprises CoCrPtTb.

Assignments (8)