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Title: System and method for manipulating domain pinning and reversal in ferromagnetic materials

Abstract

A method for manipulating domain pinning and reversal in a ferromagnetic material comprises applying an external magnetic field to a uniaxial ferromagnetic material comprising a plurality of magnetic domains, where each domain has an easy axis oriented along a predetermined direction. The external magnetic field is applied transverse to the predetermined direction and at a predetermined temperature. The strength of the magnetic field is varied at the predetermined temperature, thereby isothermally regulating pinning of the domains. A magnetic storage device for controlling domain dynamics includes a magnetic hard disk comprising a uniaxial ferromagnetic material, a magnetic recording head including a first magnet, and a second magnet. The ferromagnetic material includes a plurality of magnetic domains each having an easy axis oriented along a predetermined direction. The second magnet is positioned adjacent to the magnetic hard disk and is configured to apply a magnetic field transverse to the predetermined direction.

Inventors:
; ;
Issue Date:
Research Org.:
The University of Chicago, Chicago, IL (United States); UCL Business PLC, London (Great Britain)
Sponsoring Org.:
USDOE
OSTI Identifier:
1176524
Patent Number(s):
8558333
Application Number:
13/383,059
Assignee:
The University of Chicago (Chicago, IL) ; UCL Business PLC (London, GB)
Patent Classifications (CPCs):
G - PHYSICS G11 - INFORMATION STORAGE G11C - STATIC STORES
DOE Contract Number:  
FG02-99ER45789
Resource Type:
Patent
Resource Relation:
Patent File Date: 2010 Jul 09
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Silevitch, Daniel M., Rosenbaum, Thomas F., and Aeppli, Gabriel. System and method for manipulating domain pinning and reversal in ferromagnetic materials. United States: N. p., 2013. Web.
Silevitch, Daniel M., Rosenbaum, Thomas F., & Aeppli, Gabriel. System and method for manipulating domain pinning and reversal in ferromagnetic materials. United States.
Silevitch, Daniel M., Rosenbaum, Thomas F., and Aeppli, Gabriel. Tue . "System and method for manipulating domain pinning and reversal in ferromagnetic materials". United States. https://www.osti.gov/servlets/purl/1176524.
@article{osti_1176524,
title = {System and method for manipulating domain pinning and reversal in ferromagnetic materials},
author = {Silevitch, Daniel M. and Rosenbaum, Thomas F. and Aeppli, Gabriel},
abstractNote = {A method for manipulating domain pinning and reversal in a ferromagnetic material comprises applying an external magnetic field to a uniaxial ferromagnetic material comprising a plurality of magnetic domains, where each domain has an easy axis oriented along a predetermined direction. The external magnetic field is applied transverse to the predetermined direction and at a predetermined temperature. The strength of the magnetic field is varied at the predetermined temperature, thereby isothermally regulating pinning of the domains. A magnetic storage device for controlling domain dynamics includes a magnetic hard disk comprising a uniaxial ferromagnetic material, a magnetic recording head including a first magnet, and a second magnet. The ferromagnetic material includes a plurality of magnetic domains each having an easy axis oriented along a predetermined direction. The second magnet is positioned adjacent to the magnetic hard disk and is configured to apply a magnetic field transverse to the predetermined direction.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2013},
month = {10}
}

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