Morphological and magnetic properties of cobalt nanostructures fabricated by focused ion beam

Jerzy Jaworowicz 1,2Marek Kisielewski 1,2Jacques Ferre 1Nicolas Vernier 1Jean-Pierre Jamet 1Vitalii Zablotskii 1,2,3Andrzej Maziewski 2Iosif Sveklo 2Jacques Gierak 4Eric Bourhis 4

1. Laboratoire de Physique des Solides Université Paris-Sud (CNRS UMR8502), Orsay 91405, France
2. University of Białystok, Institute of Experimental Physics, Lipowa 41, Białystok 15-424, Poland
3. Institute of Physics ASCR, v.v.i., Na Slovance 2, Prague CZ-18221, Czech Republic
4. CNRS-Laboratoire de Photonique et Nanostructures (LPN), Route de Nozay, Marcoussis 91460, France

Abstract

Controled and reproducible fabrication of nanostructured materials are one of the main chalenges for next years. High resolution focused-ion-beam (FIB) patterning has been recently used to pattern magnetic nanoelements [1,2] . 30-keV Ga+ ions were focused on to ultrathin Pt/Co(3 nm)/Pt film as a 5 nm beam spot diameter to create arrays of square nanodots, nanostripes and irradiated narrow lines. Atomic Force Microscopy (AFM) evidence a film wetting effect [3] in FIB-irradiated regions and, for high doses the sputtering of the film surface. Considering the above film with in plane magnetization, high resolution Magneto-optical Kerr Microscopy combined with Magnetic Force Microscopy reveal that out-of-plane magnetization states can be generated by choosing properly patterning and dose in the FIB process. Particular magnetization configurations near edges of FIB affected areas are observed and discussed taking into consideration the edge effect recently predicted in [4].

[1] T.Aign, P.Meyer,S.Lemerle,et al. Phys. Rev.Lett. 81,5656 (1998)

[2]A.Ruotolo, S.Wiebel, J.-P.Jamet, N.Vernier, D.Pullini, J.Gierak, J.Ferré,

Nanotechnology 17,3308 (2006)

[3] X. Hu, D. G. Cahill, and R. S. Averback, Appl. Phys. Lett. 76 (2000) 3215.

[4] A. Maziewski, V. Zablotskii, and M. Kisielewski, Phys. Rev. B 73 (2006) 134415.

 

Related papers
  1. Magnetic Nanostructures
  2. Magnetic anisotropy of Co films annealed by laser pulses
  3. Magnetic properties of (FeAu)n alloys
  4. Magnetic anisotropy of ultrathin cobalt in Au/Co/Si/Au structures with variable Si thickness.
  5. Interlayer coupling in Ni-Fe/Au/Co/Au multilayers
  6. Modification of magnetic properties of ultrathin cobalt layers by an overlayer structure
  7. A Noble Metals Overlayer Induced Changes of Magnetic Ordering in Ultrathin Cobalt Film

Presentation: Poster at E-MRS Fall Meeting 2007, Acta Materialia Gold Medal Workshop, by Jerzy Jaworowicz
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-21 20:53
Revised:   2009-06-07 00:44