Full Paper

Direct Magnetic Patterning due to the Generation of Ferromagnetism by Selective Ion Irradiation of Paramagnetic FeAl Alloys

  1. Enric Menéndez3,4,
  2. Maciej Oskar Liedke4,
  3. Jürgen Fassbender4,
  4. Thomas Gemming5,
  5. Anja Weber6,
  6. Laura J. Heyderman6,
  7. K. V. Rao7,
  8. Seetharama C. Deevi8,
  9. Santiago Suriñach3,
  10. Maria Dolors Baró3,
  11. Jordi Sort1,*,
  12. Josep Nogués2,*

Article first published online: 16 DEC 2008

DOI: 10.1002/smll.200800783

Issue

Small

Small

Volume 5, Issue 2, pages 229–234, January 19, 2009

Additional Information

How to Cite

Menéndez, E., Liedke, M. O., Fassbender, J., Gemming, T., Weber, A., Heyderman, L. J., Rao, K. V., Deevi, S. C., Suriñach, S., Baró, M. D., Sort, J. and Nogués, J. (2009), Direct Magnetic Patterning due to the Generation of Ferromagnetism by Selective Ion Irradiation of Paramagnetic FeAl Alloys. Small, 5: 229–234. doi: 10.1002/smll.200800783

Author Information

  1. 1

    Institució Catalana de Recerca i Estudis Avançats (ICREA) Departament de Física, Universitat Autònoma de Barcelona 08193 Bellaterra (Spain)

  2. 2

    Institució Catalana de Recerca i Estudis Avançats (ICREA) Institut Català de Nanotecnologia, Edifici CM7 Campus Universitat Autònoma de Barcelona 08193 Bellaterra (Spain)

  3. 3

    Departament de Física, Universitat Autònoma de Barcelona 08193 Bellaterra (Spain)

  4. 4

    Institute of Ion Beam Physics and Materials Research Forschungszentrum Dresden-Rossendorf P.O. Box 510119, 01314 Dresden (Germany)

  5. 5

    IFW Dresden P.O. Box 270116, 01171 Dresden (Germany)

  6. 6

    Laboratory for Micro- and Nanotechnology Paul Scherrer Institut, 5232 Villigen PSI (Switzerland)

  7. 7

    Department of Materials Science and Engineering Royal Institute of Technology, S-10044, Stockholm (Sweden)

  8. 8

    Research Center, Philip Morris USA Inc. 4201 Commerce Road, Richmond, VA 23234 (USA)

*Institució Catalana de Recerca i Estudis Avançats (ICREA) Departament de Física, Universitat Autònoma de Barcelona 08193 Bellaterra (Spain).

Publication History

  1. Issue published online: 19 JAN 2009
  2. Article first published online: 16 DEC 2008
  3. Manuscript Revised: 8 OCT 2008
  4. Manuscript Received: 4 JUN 2008

Funded by

  • Swedish Agencies VINNOVA
  • SSF

SEARCH

SEARCH BY CITATION

ARTICLE TOOLS

View Full Article (HTML) Get PDF (360K)

Keywords:

  • arrays;
  • force microscopy;
  • ion irradiation;
  • magnetic materials;
  • pattern formation

Abstract

Sub-100-nm magnetic dots embedded in a non-magnetic matrix are controllably generated by selective ion irradiation of paramagnetic Fe60Al40 (atomic %) alloys, taking advantage of the disorder-induced magnetism in this material. The process is demonstrated by sequential focused ion beam irradiation and by in-parallel broad-beam ion irradiation through lithographed masks. Due to the low fluences used, this method results in practically no alteration of the surface roughness. The dots exhibit a range of magnetic properties depending on the size and shape of the structures, with the smallest dots (<100 nm) having square hysteresis loops with coercivities in excess of µ0HC = 50 mT. Importantly, the patterning can be fully removed by annealing. The combination of properties induced by the direct magnetic patterning is appealing for a wide range of applications, such as patterned media, magnetic separators, or sensors.

View Full Article (HTML) Get PDF (360K)