title: Mechanical alloying: a pressure induced reaction for obtaining zinc blende GaSb and multiphase states.
abstract: The cubic zinc blende GaSb phase was produced by a mechanical alloying technique, which is a solid state route based on the action of non-hydrostatic pressures. The thermal stability of this phase was tested using the differential scanning calorimetry technique and, in order to clarify the results, an annealing process was performed. Comparing x-ray diffraction patterns for as-prepared and annealed samples, the improvement in crystallinity of the cubic phase and Sb segregation and/or crystallization can be easily seen. Optical phonons frequencies were measured for both as-milled and annealed samples by means of the Raman spectroscopy technique. Raman profiles of as-milled samples showed typical zinc blende GaSb optical modes and revealed new features that can be associated with multiphase states.
authors.affiliation: Departamento de Física, Universidade Federal de Santa Catarina, CP 476, 88040-900 Florianópolis, SC, Brazil.
authors.forename: C E M
authors.initials: CE
authors.lastname: Campos
authors.forename: J C
authors.initials: JC
authors.lastname: de Lima
authors.forename: T A
authors.initials: TA
authors.lastname: Grandi
authors.forename: M
authors.initials: M
authors.lastname: Schmitt
authors.forename: P S
authors.initials: PS
authors.lastname: Pizani