Title: Direct Magnetic Patterning due to the Generation of Ferromagnetism by Selective Ion Irradiation of Paramagnetic FeAl Alloys
Authors: Menéndez Dalmau, Enric
Liedke, Maciej Oskar
Fassbender, Juergen
Gemming, Thomas
Weber, Anja
Heyderman, Laura J
Rao, K. V
Deevi, Seetharama C
Suriñach, Santiago
Baró, Maria Dolors
Sort, Jordi
Nogués, Josep # ×
Issue Date: 2009
Publisher: Wiley
Series Title: Small vol:5 issue:2 pages:229-234
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 m0HC=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.
ISSN: 1613-6810
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Non-KU Leuven Association publications
× corresponding author
# (joint) last author

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