B. Heinz et P. Ziemann, CHANGE OF OPTICAL-PROPERTIES DURING ION-INDUCED AMORPHIZATION OF AUIN2 FILMS, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 132(4), 1997, pp. 589-598
Citations number
29
Categorie Soggetti
Instument & Instrumentation","Nuclear Sciences & Tecnology","Physics, Atomic, Molecular & Chemical
The attenuated total reflection (ATR) technique has been combined with
low temperature ion irradiation allowing to study the changes of opti
cal properties of AuIn2 films under bombardment. For this purpose, cry
stalline films were irradiated at 80 K with 350 keV Ar+ ions resulting
in a stepwise amorphization as indicated by accompanying in situ resi
stance measurements. It is demonstrated that this ion induced amorphiz
ation also leads to significant changes of the real and imaginary part
of the index of refraction and its dispersion relation, which can be
traced back to a disappearance of band structure effects in the amorph
ous phase. Based on the optical information, a procedure can be develo
ped to extract the amorphous volume fraction, which, as a function of
the ion fluence, compares very well with the corresponding results obt
ained from the resistance data. (C) 1997 Elsevier Science B.V.