Eur. Phys. J. B (2013) 86: 90
https://doi.org/10.1140/epjb/e2013-30432-x

Regular Article

Vibrational and structural properties of an amorphous InSe₉ alloy produced by mechanical alloying

¹ Departamento de Física, Centro Politécnico, Universidade Federal do Paraná, 81531-990 Curitiba, Paraná, Brazil
² Departamento de Física, Universidade Federal do Amazonas, 69077-000 Manaus, Amazonas, Brazil
³ Centro de Engenharia e Ciências Exatas, UNIOESTE, 85903-000 Toledo, Paraná, Brazil

^a e-mail: kleber@fisica.ufpr.br

Received: 30 May 2012
Received in final form: 19 November 2012
Published online: 11 March 2013

Abstract

In this article we investigated structural and vibrational properties of an amorphous alloy of the In-Se system. The amorphous InSe₉ alloy was produced by mechanical alloying and it was studied using Raman spectroscopy and extended X-ray absorption fine structure spectroscopy techniques, and from them several properties, such as vibrational modes, average coordination numbers and interatomic distances, structural and thermal disorders, assymetry of the partial distribution functions g_ij(r), thermal expansions and Einstein temperatures were determined and compared to the values found in other alloys of the In-Se system. This comparison indicated some important differences among our alloy produced by mechanical alloying and alloys produced by other techniques, which is a clear indication of the influence of the fabrication technique in their physical properties. The main differences occur in the vibrational spectrum, with the presence of new vibrational modes, and in the structure, since Se-Se pairs are found in a higher quantity than in other In-Se alloys.