"2015-12-31+01:00"^^ . "1"^^ . . "Reversible crystallization and structural relaxation in amorphous materials used for phase change recording"@en . . "9207"^^ . . "8"^^ . . . "8"^^ . . "2011-01-01+01:00"^^ . "0"^^ . . "The project is focused on a detailed study of reversible crystallization processes as well as the structural relaxation\u00A0in phase change materials that are used for rewriteable optical or RAM data storage media. Selected compositions of chalcogenide amorphous materials in Ge-Sb-Te and Ge-Sb-Se systems will be prepared. Crystallization processes will be studied by using thermal analysis and various microscopy techniques in combination with some novel methods. A systematic study of thermodynamic properties and viscosity behavior of these compositions will be performed as an integral part of this project. The experimental and theoretical study of structural relaxation in phase change materials is proposed. It will be monitored by volume, enthalpy or entropy change as a function of long term annealing at selected temperatures in the glass transition range. Such a combined approach is useful for searching new materials with tailored properties as well as to better control the reversible crystallization process and to predict the long term stability of amorphous phase. Both aspects are essential for further development of phase change memory devices."@en . . . "crystallization, structural relaxation, amorphous materials, viscosity, phase change media"@en . . "0"^^ . . . "Reverzibiln\u00ED krystalizace a strukturni relaxace amorfn\u00EDch materi\u00E1l\u016F pro z\u00E1znam informace"@cs . "9207"^^ . "P\u0159edm\u011Btem projektu je detailn\u00ED studium reverzibiln\u00EDch krystaliza\u010Dn\u00EDch proces\u016F a strukturni relaxace amorfn\u00EDch materi\u00E1l\u016F pro optick\u00FD a elektrick\u00FD z\u00E1znam informace. Krystaliza\u010Dn\u00ED procesy budou studov\u00E1ny na\u00A0 vybran\u00FDch slo\u017Een\u00EDch amorfn\u00EDch materi\u00E1l\u016F v\u00A0syst\u00E9mech Ge-Sb-Te a Ge-Sb-Se s\u00A0vyu\u017Eit\u00EDm termoanalytick\u00FDch metod a mikroskopick\u00FDch technik v\u00A0kombinaci s\u00A0n\u011Bkter\u00FDmi nov\u011B vyvinut\u00FDmi metodami. Sou\u010D\u00E1st\u00ED projektu je t\u00E9\u017E studium termodynamick\u00FDch vlastnost\u00ED a viskozitn\u00EDho chov\u00E1n\u00ED zm\u00EDn\u011Bn\u00FDch syst\u00E9m\u016F. Dal\u0161\u00ED oblast\u00ED je experiment\u00E1ln\u00ED a teoretick\u00E9 studium strukturn\u00ED relaxace monitorovan\u00E9 pomoc\u00ED mikroskopick\u00FDch zm\u011Bn objemu a entalpie v\u00A0z\u00E1vislosti na dlouhodob\u00E9 temperaci v\u00A0oblasti skeln\u00E9 transformace. Navr\u017Een\u00FD komplexn\u00ED p\u0159\u00EDstup je slibn\u00FD pro hled\u00E1n\u00ED nov\u00FDch materi\u00E1l\u016F s\u00A0definovan\u00FDmi vlastnostmi, pro lep\u0161\u00ED vyu\u017Eit\u00ED reverzibiln\u00ED krystalizace a predikci dlouhodob\u00E9 stability amorfn\u00ED f\u00E1ze. Oba tyto aspekty maj\u00ED z\u00E1sadn\u00ED v\u00FDznam pro budouc\u00ED v\u00FDvoj m\u00E9di\u00ED pro z\u00E1znam informace na b\u00E1zi amorfn\u00EDch chalkogenid\u016F.\u00A0\u00A0\u00A0"@cs .