XRD CHARACTERIZATION OF MULTILAYERED SYSTEMS

被引:22
作者
SCARDI, P [1 ]
LUTTEROTTI, L [1 ]
TOMASI, A [1 ]
机构
[1] IST RIC SCI & TECNOL,I-38050 TRENT,ITALY
关键词
D O I
10.1016/0040-6090(93)90657-B
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An innovative procedure has been devised for the processing of X-ray diffraction data from thin films and layered samples, using the conventional Bragg-Brentano geometry. Conventional phase analysis procedures always consider the sample as a homogeneous set of crystals with random orientation; this assumption can lead to severe errors when studying layered samples with thickness less than the penetration depth of the X-rays. Two effects have been considered: the transparency of the layers, that limits the diffracted intensity, and the absorption of the outer layers, that reduces both the incident and the diffracted intensity. Both effects can be described by functions connecting the layer thickness and the absorption coefficient of the present phases to the total diffracted intensity. Adopting this strategy, the thickness of each layer and its phase composition can be refined together with the other structural parameters of interest, such as lattice parameters, crystallite size, microstrain and preferred orientation. The methodology has been tested on samples obtained by physical vapor deposition and by thermal oxidation of metal surfaces.
引用
收藏
页码:130 / 134
页数:5
相关论文
共 18 条
[1]  
BUNGE HJ, 1982, TEXTURE ANAL MATERIA
[2]   CORRECTION OF INTENSITIES FOR PREFERRED ORIENTATION IN POWDER DIFFRACTOMETRY - APPLICATION OF THE MARCH MODEL [J].
DOLLASE, WA .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1986, 19 (pt 4) :267-272
[3]   ON THE METASTABILITY PHENOMENA IN THE ZRO2-CAO SYSTEM [J].
DURAN, P ;
RECIO, P ;
MOURE, C .
JOURNAL OF MATERIALS SCIENCE LETTERS, 1992, 11 (11) :727-730
[4]  
FERRARI M, UNPUB J APPL PHYS
[5]   STRUCTURAL-ANALYSIS OF TINX FILMS PREPARED BY REACTIVE-ION-BEAM-ENHANCED DEPOSITION [J].
KOTHARI, DC ;
SCARDI, P ;
GIALANELLA, S ;
GUZMAN, L .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1990, 61 (04) :627-637
[6]  
LARSEN RA, 1989, ADV XRAY ANAL, V32, P311
[7]   SIMULTANEOUS STRUCTURE AND SIZE-STRAIN REFINEMENT BY THE RIETVELD METHOD [J].
LUTTEROTTI, L ;
SCARDI, P .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1990, 23 :246-252
[8]   LS1 - A COMPUTER-PROGRAM FOR SIMULTANEOUS REFINEMENT OF MATERIAL STRUCTURE AND MICROSTRUCTURE [J].
LUTTEROTTI, L ;
SCARDI, P ;
MAISTRELLI, P .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1992, 25 :459-462
[9]  
LUTTEROTTI L, 1993, IN PRESS MATER SCI F
[10]   X-RAY-DIFFRACTION STUDY OF ZR(CA,Y)O2-X .1. AVERAGE STRUCTURE [J].
MORINAGA, M ;
COHEN, JB ;
FABER, J .
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES, 1979, 35 (SEP) :789-795