TY - JOUR
T1 - Ellipsometric characterization on multi-layered thin film systems during hydrogenation
AU - Santjojo, D. J.
AU - Aizawa, Tatsuhiko
AU - Muraishi, S.
PY - 2007/6
Y1 - 2007/6
N2 - Ellipsometric characterization on the basis of multi-layered modeling is proposed to describe the optical and electrical property transients of hydrogenated films. In particular, two-step modeling is developed to make ellipsometric characterization on the yttrium film and the palladium capped yttrium film deposited on the SiO2 glass substrate. In the former, Y2O3 film deposited on SiO2 substrate is prepared to estimate the dielectric response of yttrium oxide layer as the first step. These data are further utilized in the second step to determine optical and electric properties of yttrium-base multi-layers which are composed of metallic yttrium, composite of metallic yttrium and Y2O3, and Y2O3 layer with surface roughness. In the latter, a palladium film deposited on SiO2 substrate is prepared to investigate the dielectric response of palladium hydrides. The estimated dispersion functions are further used in the multi-layered modeling for hydrogenated Pd-capped yttrium films on the SiO2 substrate. Under the ambient hydrogen pressure, palladium coated yttrium films have low resistivity and hydrogenated yttrium is still metallic. This palladium coating works as a top capping layer for yttrium film during hydrogenation and de-hydrogenation.
AB - Ellipsometric characterization on the basis of multi-layered modeling is proposed to describe the optical and electrical property transients of hydrogenated films. In particular, two-step modeling is developed to make ellipsometric characterization on the yttrium film and the palladium capped yttrium film deposited on the SiO2 glass substrate. In the former, Y2O3 film deposited on SiO2 substrate is prepared to estimate the dielectric response of yttrium oxide layer as the first step. These data are further utilized in the second step to determine optical and electric properties of yttrium-base multi-layers which are composed of metallic yttrium, composite of metallic yttrium and Y2O3, and Y2O3 layer with surface roughness. In the latter, a palladium film deposited on SiO2 substrate is prepared to investigate the dielectric response of palladium hydrides. The estimated dispersion functions are further used in the multi-layered modeling for hydrogenated Pd-capped yttrium films on the SiO2 substrate. Under the ambient hydrogen pressure, palladium coated yttrium films have low resistivity and hydrogenated yttrium is still metallic. This palladium coating works as a top capping layer for yttrium film during hydrogenation and de-hydrogenation.
KW - Dielectric dispersive functions
KW - Ellipsometry
KW - Hydrogenation
KW - Multi-layered modeling
KW - Palladium-capping
KW - Yttrium films
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U2 - 10.2320/matertrans.MRA2006193
DO - 10.2320/matertrans.MRA2006193
M3 - Article
AN - SCOPUS:34547452756
VL - 48
SP - 1380
EP - 1386
JO - Materials Transactions
JF - Materials Transactions
SN - 1345-9678
IS - 6
ER -