Composite media for perpendicular magnetic recording

@article{Victora2005CompositeMF,
  title={Composite media for perpendicular magnetic recording},
  author={Randall H. Victora and Xiao Shen},
  journal={IEEE Transactions on Magnetics},
  year={2005},
  volume={41},
  pages={537-542}
}
A composite perpendicular recording media consisting of magnetically hard and soft regions within each grain is proposed. Application of applied field initially causes the magnetization of the soft region to rotate and, thus, change the angle of the effective field applied to the hard region. This important change in the effective field is enabled by an exchange layer that moderates the interaction between the two regions. Energy arguments show that the resulting performance (as measured by the… 
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TLDR
This paper reviews the recent work on composite media including two spin and complete micromagnetic models for ECC media, exchange spring media, synthetic antiferromagnet E CC media, and experimental results in support of these theories.
Relationship between composite and imperfect materials in perpendicular recording media (invited)
It is common to model recording media as interacting coherently rotating magnetic moments, but real materials frequently exhibit perpendicular switching fields less than the anisotropy field and a
Domain wall assisted magnetic recording (invited)
The domain wall assisted switching in the hard/soft composite nanostructures is studied using numerical and analytic micromagnetics. The switching occurs via domain wall nucleation, compression in
Exchange coupled composite media for perpendicular recording
  • R. Victora, Xiao Shen
  • Physics
    INTERMAG Asia 2005. Digests of the IEEE International Magnetics Conference, 2005.
  • 2005
For conventional perpendicular recording media of saturation magnetization M/sub S/ and grain volume V, the ratio of the stabilizing energy barrier /spl Delta/E to the switching field H/sub S/ is
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References

SHOWING 1-9 OF 9 REFERENCES
Areal density limits for perpendicular magnetic recording
Summary form only given. It is becoming clear that conventional longitudinal magnetic recording is approaching the superparamagnetic limit and that further density increases must be achieved using an
Dynamic coercivity measurements of antiferromagnetically coupled magnetic media layers
We have performed dynamic coercivity measurements on a series of antiferromagnetically coupled (AFC) magnetic recording media utilizing a static write/read tester. The samples consist of two magnetic
Magnetic recording configuration for densities beyond 1 Tb/in/sup 2/ and data rates beyond 1 Gb/s
A new magnetic recording system is evaluated that includes the single-pole head, a new medium design, and the soft underlayer of perpendicular recording. The proposed medium consists of perpendicular
Improved thermal stability of synthetic ferrimagnetic media with enhanced exchange coupling strength
The effect of the antiferromagnetic interlayer exchange coupling strength J between the initial or stabilization magnetic layer L1 and the top magnetic layer L2 on the thermal stability of synthetic
Approaches to tilted magnetic recording for extremely high areal density
In this paper, we systematically present our fundamental understanding of the advantages of tilted magnetic recording. We investigate the various configurations of tilted magnetic recording including
Unshielded perpendicular recording head for 1 Tb/in/sup 2/
A full three-dimensional (3-D) self-consistent micromagnetic code has been employed to design an unshielded perpendicular writer for an areal density of 1 Tb/in/sup 2/. The head consists of a
Antiferromagnetically coupled perpendicular recording media
  • E. Girt, H. Richter
  • Physics
    Digest of INTERMAG 2003. International Magnetics Conference (Cat. No.03CH37401)
  • 2003
In this paper, we will analyse the stabilization mechanism of antiferromagnetically coupled perpendicular (AFCP) media by calculating the effective energy barrier for the magnetization reversal of
Analysis of transition shape and adjacent track aging for 1 Tb/in/sup 2/ write head designs
This paper analyzes the write field profiles for perpendicular head designs that have been proposed for reaching 1 Tb/in/sup 2/. Designs considered include side shielded poles and high anisotropy
One terabit per square inch perpendicular recording conceptual design
Analysis based on the use of a high-gradient shielded pole write head indicates that a one terabit per square inch perpendicular recording system can be realized. System features include the