28 May 2004 Approach to terabit density for magnetic data storage using direct optical patterning of Fe(Co)-based thin films
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Proceedings Volume 5401, Micro- and Nanoelectronics 2003; (2004) https://doi.org/10.1117/12.562650
Event: Micro- and Nanoelectronics 2003, 2003, Zvenigorod, Russian Federation
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.
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Nikolay I. Polushkin, B. A. Gribkov, A. Ya. Lopatin, "Approach to terabit density for magnetic data storage using direct optical patterning of Fe(Co)-based thin films", Proc. SPIE 5401, Micro- and Nanoelectronics 2003, (28 May 2004); doi: 10.1117/12.562650; https://doi.org/10.1117/12.562650
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