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Applied Physics Letters / Volume 95 / Issue 2 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 95, 022514 (2009); doi:10.1063/1.3175723 (3 pages)

Magnetoresistance based first-order reversal curve analysis of magnetic tunnel junctions

J. M. Pomeroy1, T. C. White1, H. Grube1, J. C. Read1, and J. E. Davies2

1National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
2Advanced Technology Group, NVE Corporation, Eden Prairie, Minnesota 55344, USA

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(Received 29 April 2009; accepted 19 June 2009; published online 16 July 2009)

First-order reversal curve (FORC) analysis is conventionally applied to magnetization versus applied magnetic field loops to determine the ensemble properties of multidomain magnetic samples ranging from naturally occurring geological samples to exquisitely engineered materials for use in magnetic storage. We apply FORC analysis to magnetic tunnel junctions (MTJs) by using magnetoresistance instead of magnetization field. By using the MTJ resistance to monitor domain switching, arbitrarily small samples can be studied, as well as functioning devices after lithographic patterning. Experimental data are presented from sub-0.01 mm2 MTJs that illustrate the application of FORC analysis and demonstrate asymmetric switching distributions when mapped in coercive versus interaction field space.

© 2009 American Institute of Physics

ERRATUM

  1. Erratum: “Magnetoresistance based first-order reversal curve analysis of magnetic tunnel junctions” [Appl. Phys. Lett. 95, 022514 (2009)]
    J. M. Pomeroy et al.
    Appl. Phys. Lett. 96, 039901 (2010)APPLAB000096000003039901000001

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KEYWORDS and PACS

Keywords

aluminium compounds, cobalt, cobalt compounds, coercive force, copper, gold, magnetic domains, magnetic storage, magnetic switching, magnetic tunnelling, magnetoresistance

PACS

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 75.70.Kw

    Domain structure (including magnetic bubbles and vortices)

ARTICLE DATA

Permalink
http://link.aip.org/link/doi/10.1063/1.3175723

PUBLICATION DATA

ISSN:

0003-6951 (print)  
1077-3118 (online)

Publisher:

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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