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Proceedings Paper

Approach to terabit density for magnetic data storage using direct optical patterning of Fe(Co)-based thin films
Author(s): Nikolay I. Polushkin; B. A. Gribkov; A. Ya. Lopatin
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Paper Abstract

We report on physical mechanisms and methods for optical (λ=300-150 nm) patterning of thin alloyed layers of transition metals (Fe, Co) via laser-induced ferromagnetic ordering (LIFO) in the initially paramagnetic alloys. It is argued that LIFO preceded by film melting and arises due to phase separation in the alloys. Using a laser (λ=300-150 nm) interferometric technique for direct patterning on the phase transitions, we have successfully produced large-area (up to 1 cm) arrays of nanoscale (down to 100 nm) magnets. Due to the observed threshold character of LIFO, the patterned features can be small comparable to the radiation wavelength (~λ/10). This finding is expected to allow making the extreme features (down to 15-20 nm) and thus gives a potential advantage for using such directly patterned magnetic media in future storage data systems with ultrahigh densities ( ~ 1 Tbit/in2). The first experiments on formation of the extreme features by use of LIFO have been performed.

Paper Details

Date Published: 28 May 2004
PDF: 6 pages
Proc. SPIE 5401, Micro- and Nanoelectronics 2003, (28 May 2004); doi: 10.1117/12.562650
Show Author Affiliations
Nikolay I. Polushkin, Institute for Physics of Microstructures (Russia)
B. A. Gribkov, Institute for Physics of Microstructures (Russia)
A. Ya. Lopatin, Institute for Physics of Microstructures (Russia)

Published in SPIE Proceedings Vol. 5401:
Micro- and Nanoelectronics 2003
Kamil A. Valiev; Alexander A. Orlikovsky, Editor(s)

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