Study of defects in GeTe and (GeTe)(1-x)(AgBiTe2)(x) solid solutions by positrons

Authors
Misheva, M Avramova, I Plachkova, S Djourelov, N
Citation
M. Misheva et al., Study of defects in GeTe and (GeTe)(1-x)(AgBiTe2)(x) solid solutions by positrons, ACT PHY P A, 99(3-4), 2001, pp. 423-428
Citations number
14
Categorie Soggetti
Physics
Journal title
ACTA PHYSICA POLONICA A
ISSN journal
05874246 → ACNP
Volume
99
Issue
3-4
Year of publication
2001
Pages
423 - 428
Database
ISI
SICI code
0587-4246(200103/04)99:3-4<423:SODIGA>2.0.ZU;2-8
Abstract
Positron lifetimes and Doppler broadening of the annihilation line measurem ents were performed to study the vacancy type defects ill polycrystalline G eTe and (GeTe)((--x))(AgBiTe2)(x) (x = 0, 0.03, 0.05, 0.1, 0.15, 0.2, and 1 ) solid solutions. The values of lifetimes obtained are explained as due to positron and positronium saturated trapping at vacancies and vacancy clust ers. The interdependence between mean positron lifetime and hole concentrat ion is discussed.