Unlock instant, AI-driven research and patent intelligence for your innovation.

Magnetic layering for bit-patterned media

A patterned, medium technology, applied in the direction of pattern record carrier, magnetic recording, different record carrier forms, etc., can solve the problem of energy increase and so on

Inactive Publication Date: 2015-03-25
SEAGATE TECH LLC
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, higher anisotropy results in an increase in the energy required to write or record information in each bit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnetic layering for bit-patterned media
  • Magnetic layering for bit-patterned media
  • Magnetic layering for bit-patterned media

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The following detailed description is exemplary in nature and is not intended to limit the scope, applicability, or configuration of the invention in any way. Rather, the following description provides practical illustrations for implementing the exemplary embodiments.

[0010] figure 1 is a plan view of a data storage system 10 including a magnetic recording medium 100 according to some embodiments of the present disclosure. figure 1 The system 10 is shown further comprising a magnetic read / write head 120, such as is known to those skilled in the art, comprising figure 2 An inductive write element 12 generating a magnetic field H for recording is shown.

[0011] figure 2 is a schematic cross-sectional view of a portion of the passage system 10 according to some embodiments. figure 2 A non-magnetic protective layer 26 (e.g., carbon, Ru, Cr) of the medium 100 is shown covering the recording layer of the medium 100, which includes a plurality of bit-patterned magne...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

A perpendicular magnetic recording layer of a magnetic recording medium includes a plurality of bit-patterned magnetic islands, wherein each of the plurality of islands overlay a soft magnetic under-layer. Each of the magnetic islands includes a first magnetic sub-layer adjacent a second magnetic sub-layer, wherein the first sub-layer has a relatively high magnetic anisotropy that is greater than a magnetic anisotropy of the second sub-layer. The magnetic recording layer further includes a third sub-layer, which extends to connect each of the plurality of islands. The third sub-layer may have a magnetic anisotropy that is less than that of the second sub-layer of each of the magnetic islands and / or may serve as an interlayer, extending between the first sub-layer and the soft magnetic under-layer of the recording medium, and having a structure to help to produce the greater anisotropy first magnetic sub-layer.

Description

Background technique [0001] In recent years, a significant increase in the storage capacity of magnetic bit-patterned recording media has been achieved by shrinking the size of each magnetic bit, thereby increasing its density. Smaller magnetic islands consist of fewer magnetic grains and thus are more susceptible to random thermal or shock-induced orientation changes. One way to improve the stability of each magnetic bit or island of reduced size is to employ a relatively high anisotropy magnetic material. However, higher anisotropy results in an increase in the energy required to write or record information in each bit. Researchers have looked to graded anisotropy media as a means to balance stability and writing efficiency. The present disclosure relates to an alternative design for a magnetic recording layer of a magnetic bit patterned recording medium that employs graded anisotropy to increase write efficiency without compromising thermal stability. Contents of the in...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/667
CPCB82Y10/00G11B5/82G11B5/743
Inventor E·格特D·K·威尔勒A·Y·多宾B·F·法尔库T·F·安布罗斯Y·彭Y·A·久保田A·海卢
Owner SEAGATE TECH LLC