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) : Edelstein, Alan S

PDF Url : ADD018508

Report Date : 15 May 1997

Pagination or Media Count : 18

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.

Descriptors :   *FERROMAGNETIC MATERIALS, *MAGNETIC RECORDING SYSTEMS, MAGNETIC FIELDS, MATRIX MATERIALS, ANISOTROPY, INFORMATION RETRIEVAL, MAGNETIC MATERIALS, ANTIFERROMAGNETISM, PARAMAGNETISM

Subject Categories : Recording and Playback Devices
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE