Quantification of the Interaction Field in Arrays of Magnetic Nanowires from the Remanence Curves

  • Elsie Araujo
  • Juan Manuel Martínez-Huerta
  • Luc Piraux
  • Armando Encinas
Original Paper
  • 54 Downloads

Abstract

A method is presented that allows quantifying the average value of the interaction field in arrays of magnetic nanowires from the field difference between the isothermal remanence (IRM) and the DC demagnetizing (DCD) remanence curves when the normalized magnetization is equal to one third. Arrays of magnetic nanowires of different diameters and packing fractions are used to experimentally test the method. The results have been compared with those obtained using the method based on the difference between the remanence coercivity fields and with a mean-field expression for the interaction field, providing a very good agreement and thus validating the method. Additionally, it is shown that both the position (m0) and the shift along the magnetization axis of the intersection between the remanence curves with respect to the value of one third (δm = m0 − 1/3) provide qualitative information about the interaction field. The former indicates the type of interaction depending if the intersection is above (m0 > 1/3) or below (m0 < 1/3), which corresponds to a ferro or anti-ferro magnetic interaction, respectively. While for the latter, it is shown that the maximum deviation of the Delta-M plot from zero (ΔM m a x ) corresponds to three times the shift (ΔM m a x = 3δm).

Keywords

Dipolar interaction Remanence curves Delta-M plot Magnetic nanowires 

Notes

Acknowledgements

The authors thank E. Ferain of it4ip S. A. for providing the PC membranes. E. Araujo thanks Fondo CONACYT- Secretaría de Energía - Sustentabilidad Energética.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Elsie Araujo
    • 1
  • Juan Manuel Martínez-Huerta
    • 1
  • Luc Piraux
    • 2
  • Armando Encinas
    • 1
  1. 1.División de Materiales AvanzadosInstituto Potosino de Investigación Científica y TecnológicaSan Luis PotosíMexico
  2. 2.Institute of Condensed Matter and NanosciencesUniversité catholique de LouvainLouvain-la-NeuveBelgium

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