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Writing and reading of single magnetic domain per bit perpendicular patterned media

Appl. Phys. Lett. 74, 2516 (1999); doi:10.1063/1.123885

Issue Date: 26 April 1999

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Mladen Todorovic and Sheldon Schultz
Department of Physics and Center for Magnetic Recording Research, University of California, San Diego, La Jolla, California 92093-0319

Joyce Wong and Axel Scherer
Department of Electrical Engineering, California Institute of Technology, Pasadena, California 91125
By fabricating patterned media with a large number of nanoscale single domain magnetic particles embedded in a nonmagnetic substrate, and by writing the magnetization for each of these particles in a desired direction, nonvolatile magnetic storage of information could reach densities much higher than what is currently thought possible for longitudinal continuous media. We have fabricated high aspect ratio perpendicular nickel columnar nanoparticles embedded in a hard Al2O3/GaAs substrate. We show that the magnetization states of the individual magnets can be controlled by demonstrating that prototype patterned "single magnetic domain per bit" data tracks can be written and read back using current magnetic information storage technology. ©1999 American Institute of Physics.
History: Received 15 January 1999; accepted 26 February 1999
Permalink: http://link.aip.org/link/?APPLAB/74/2516/1
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KEYWORDS and PACS

Keywords
PACS
  • 75.50.Ss
    Magnetic properties and materials Studies of specific magnetic materials Magnetic recording materials
  • 85.70.Li
    Electronic and magnetic devices; microelectronics Magnetic devices Other magnetic recording and storage devices (including tapes, disks, and drums)
  • 75.50.Tt
    Magnetic properties and materials Studies of specific magnetic materials Fine-particle systems
  • 75.50.Kj
    Magnetic properties and materials Studies of specific magnetic materials Amorphous and nanocrystalline magnetic materials; quasicrystals
  • 75.60.Ch
    Magnetic properties and materials Domain effects, magnetization curves, and hysteresis Domain walls and domain structure
  • 75.60.Ej
    Magnetic properties and materials Domain effects, magnetization curves, and hysteresis Magnetization curves, hysteresis, Barkhausen and related effects
  • 75.50.Cc
    Magnetic properties and materials Studies of specific magnetic materials Other ferromagnetic metals and alloys
  • YEAR: 1999

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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REFERENCES (19)
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