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X‐ray K‐absorption edge studies in a‐Ga 30 Se 70 and a‐Ga 30 Se 70 − x In x
Author(s) -
Malik M. Manzar,
Nigam A. N.,
Husain M.
Publication year - 1992
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300210409
Subject(s) - electronegativity , ternary operation , absorption edge , indium , absorption (acoustics) , analytical chemistry (journal) , enhanced data rates for gsm evolution , covalent bond , crystallography , k edge , selenium , bond length , materials science , chemistry , absorption spectroscopy , crystal structure , band gap , physics , optics , metallurgy , computer science , composite material , programming language , telecommunications , optoelectronics , organic chemistry , chromatography
The shift of the K‐absorption edge (Δ E k ) was measured in ternary alloys of Ga 30 Se 70‐x In x (x = 0, 5, 10, 15, 20) with respect to the binary Ga 30 Se 70 alloy. It was observed that the K‐edge of selenium shifted progressively towards the lower energy side as the indium concentration increased from 0 to 10 at.%. However, at higher concentrations, the relative shift started to decrease. These results are in accordance with Pauling's concept of electronegativity and indicate that the nature of the bond is iono‐covalent in these glasses, as found in many crystalline solids. The composition dependence of the edge shift is also discussed in terms of the structure of the SeGa system.