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KSb 5 S 8 : A Wide Bandgap Phase‐Change Material for Ultra High Density Rewritable Information Storage
Author(s) -
Kyratsi T.,
Chrissafis K.,
Wachter J.,
Paraskevopoulos K.M.,
Kanatzidis M.G.
Publication year - 2003
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.200304994
Subject(s) - materials science , band gap , stoichiometry , crystallization , phase (matter) , kinetic energy , crystal (programming language) , crystallography , optoelectronics , thermodynamics , chemistry , computer science , physics , organic chemistry , quantum mechanics , programming language
A well defined, congruently melting stoichiometric system , KSb 5 S 8 (see Figure), with a wide optical energy gap that undergoes rapid reversible crystal–glass transformation is described. The activation energy of crystallization E c was calculated to be ∼ 167 kJ mol –1 . The kinetic parameters and energy bandgaps of KSb 5 S 8 suggest a new inexpensive phase‐change material for possible ultra high density data storage applications.