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Thermomechanical High‐Density Data Storage in a Metallic Material Via the Shape‐Memory Effect
Author(s) -
Shaw G. A.,
Trethewey J. S.,
Johnson A. D.,
Drugan W. J.,
Crone W. C.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200400942
Subject(s) - materials science , planarity testing , shape memory alloy , nickel titanium , nanoscopic scale , computer data storage , transducer , composite material , metal , optoelectronics , nanotechnology , metallurgy , acoustics , crystallography , computer hardware , chemistry , physics , computer science
By exploiting the shape‐memory effect in NiTi, it is demonstrated for the first time that a metallic material can be used for rewriteable, thermomechanical data storage. Data are written as surface indentations by a nanoscale mechanical probe, read by a transducer, and erased by heating. A data array with a storage density of 10 Gbit in. –2 (∼ 6500 nm 2 bit –1 ) is demonstrated (see Figure) but much higher storage densities are attainable with improved film planarity.