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Fabricating high-density magnetic storage elements by low-dose ion beam irradiation

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7 Author(s)
Neb, R. ; Fachbereich Physik and Research Center Optimas, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße 56, 67663 Kaiserslautern, Germany ; Sebastian, T. ; Pirro, P. ; Hillebrands, B.
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We fabricate magnetic storage elements by irradiating an antiferromagnetically coupled ferromagnetic/nonmagnetic/ferromagnetic trilayer by a low-dose ion beam. The irradiated areas become ferromagnetically coupled and are capable of storing information if their size is small enough. We employ Fe/Cr/Fe trilayers and a 30 keV focused Ga+-ion beam to demonstrate the working principle for a storage array with a bit density of 7  Gbit/in.2. Micromagnetic simulations suggest that bit densities of at least two magnitudes of order larger should be possible.

Published in:

Applied Physics Letters  (Volume:101 ,  Issue: 11 )

Date of Publication:

Sep 2012

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