title: Development of structural order during supercooling of a fragile oxide melt.
abstract: The authors have studied the structural evolution of the fragile glass-forming liquid CaAl2O4 during supercooling from the stable liquid phase to the cold glass below Tg. The evolution is characterized by a sharpening of the first diffraction peak and a shortening of the average nearest-neighbor bond length around 1.25Tg, indicating an increase in the degree of both intermediate-range and short-range orders occurring close to the dynamical crossover temperature. The cooling curve developed a kink at this temperature, indicating a simultaneous change in thermodynamic properties.
authors.affiliation: Centre de Recherche sur les Matériaux à Haute Température, 45071 Orléans Cedex 2, France. hennet@cnrs-orleans.fr
authors.forename: L
authors.initials: L
authors.lastname: Hennet
authors.forename: I
authors.initials: I
authors.lastname: Pozdnyakova
authors.forename: A
authors.initials: A
authors.lastname: Bytchkov
authors.forename: D L
authors.initials: DL
authors.lastname: Price
authors.forename: G N
authors.initials: GN
authors.lastname: Greaves
authors.forename: M
authors.initials: M
authors.lastname: Wilding
authors.forename: S
authors.initials: S
authors.lastname: Fearn
authors.forename: C M
authors.initials: CM
authors.lastname: Martin
authors.forename: D
authors.initials: D
authors.lastname: Thiaudière
authors.forename: J-F
authors.initials: JF
authors.lastname: Bérar
authors.forename: N
authors.initials: N
authors.lastname: Boudet
authors.forename: M-L
authors.initials: ML
authors.lastname: Saboungi