Accession Number:

ADD018508

Title:

Methods and Materials for Magnetic Recording While Avoiding the Superparamagetic Limit.

Descriptive Note:

Patent application, filed 15 May 97,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1997-05-15

Pagination or Media Count:

18.0

Abstract:

The present invention is, in one aspect, a high anisotropy magnetic composite, having a plurality of ferromagnetic particles, where these ferromagnetic particles are disposed within an antiferromagnetic material, which may either be a coating for the particles, or a matrix in which the particles are disposed and a matrix material antiferromagnetic or otherwise. Typically, this material will be disposed on a substrate. In another aspect, the invention is a method for magnetically recording data, comprising the step of exposing a magnetic recording medium according to the invention to a writing magnetic field. In another aspect, the invention is a method for reading magnetically recorded data, comprising the steps of positioning a read head in proximity to a magnetic recording medium according to the invention, where the read head can read the magnetization of a region on the magnetic recording medium, and translating the read head relative to the magnetic recording medium, where the read head is thus sequentially brought into proximity to a plurality of separately written regions on the magnetic recording medium.

Subject Categories:

  • Recording and Playback Devices
  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE