Proceedings of the European Symposium on Frontiers in Science and Technology with Synchrotron Radiation

J. Phys. IV France 04 (1994) C9-151-C9-154
DOI: 10.1051/jp4:1994923

Combined x-ray absorption and x-ray diffraction studies of CuGaS₂, CuGaSe₂, CuFeS₂ and CuFeSe₂ under high pressure

T. Tinoco¹, J.P. Itié^{1, 2}, A. Polian¹, A. San Miguel^{1, 3}, E. Moya¹, P. Grima¹, J. Gonzalez⁴ and F. Gonzalez<sup>5

1</sup>  Physique des Milieux Condensés, Université P. & M. Curie, 4 Place Jussieu, BP. 77, 75252 Paris cedex 05, France
²  LURE, Université Paris Sud, Bât. 209D, 91405 Orsay cedex, France
³  ESRF, BP. 220, 38043 Grenoble cedex, France
⁴  Centro de Estudios de Semiconductores, Universidad de los Andes, Merida 5101, Venezuela
⁵  Departimento de Fisica, Universidad Central de Venezuela, Ap. 47586, Caracas 1041A, Venezuela

Abstract
I-III-VI₂ compounds CuGaS₂, CuGaSe₂, CuFeS₂ and CuFeSe₂ have been studied by x-ray absorption spectroscopy and x-ray diffraction as a function of pressure. The combination of both techniques allowed the complete determination of the structures in their whole stability range. The equation of state of these compounds have been determined, as well as the volume compression at the transitions. The recovered phases after a pressure cycle are identical to the initial phases.

© EDP Sciences 1994