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Applied Physics Letters / Volume 97 / Issue 19 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 97, 192506 (2010); http://dx.doi.org/10.1063/1.3514554 (3 pages)

Experimental determination of the magnetization dependent part of the demagnetizing field in hard magnetic materials

A. N. Dobrynin1,2, T. R. Gao1, N. M. Dempsey1, and D. Givord1

1Institut Néel, CNRS-UJF, 25 Rue des Martyrs, 38042 Grenoble, France
2Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, United Kingdom

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(Received 29 June 2010; accepted 19 October 2010; published online 12 November 2010)

A method for extracting the magnetization dependent part of the demagnetizing field from minor hysteresis loops is described. It applies to hard magnetic materials with irreversible magnetization switching. The method’s validity is tested on the simulated magnetization curves of an assembly of hard magnetic grains, as well as on a thin NdFeB film with out of plane magnetization. Effective demagnetization factors are extracted from the analysis. These factors are smaller than the usually applied sample shape dependent demagnetizing factors.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

boron alloys, demagnetisation, iron alloys, magnetic hysteresis, magnetic switching, magnetic thin films, neodymium alloys, permanent magnets

PACS

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 75.50.Ww

    Permanent magnets

  • 75.70.Ak

    Magnetic properties of monolayers and thin films

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3514554

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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    A. N. Dobrynin, V. M. T. S. Barthem, and D. Givord, Appl. Phys. Lett. 95, 052511 (2009)APPLAB000095000005052511000001.

    A. N. Dobrynin, V. M. T. S. Barthem, F. Ingwiller, and D. Givord, Phys. Rev. B 81, 172403 (2010).

    M. Winklhofer and G. T. Zimanyi, J. Appl. Phys. 99, 08E710 (2006)JAPIAU00009900000808E710000001.

    N. M. Dempsey, A. Walther, F. May, D. Givord, K. Khlopkov, and O. Gutfleisch, Appl. Phys. Lett. 90, 092509 (2007)APPLAB000090000009092509000001.


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