Published December 2003 | Version v1
Journal article Metadata-only

GexSi1-x crystalline solid solutions: local atomic structure by combined EXAFS data on Ge and Si absorption edges

Creators

  • 1. Udmurtskij Gosudarstvennyj Univ., Izhevsk (Russian Federation)
  • 2. UrO RAN, Inst. Fiziki Metallov, Ekaterinburg (Russian Federation)
  • 3. UrO RAN, Fiziko-Tekhnicheskij Inst., Izhevsk (Russian Federation)

Description

A new method of studying local structure in binary solid solution by combined EXAFS is proposed. It consists in solution of the system of integral equations describing two EXAFS spectra by Tikhonov regularization method. The new iteration procedure with trial functions and the projection operator is proposed to refine the solution. This method has the rather quick convergence. The contribution of multiple scattering is taken into account. This method is applied to obtain local structure information on the Ge-Si solid solutions

Abstract (Russian)

Использован метод изучения локальной атомной структуры бинарных твердых растворов по комбинированным EXAFS-данным. С помощью регуляризации по Тихонову решается система интегральных уравнений, описывающих два EXAFS-спектра. Применена итерационная процедура уточнения решения с использованием пробных функций, заданных в виде суммы гауссиан, описывающих пики парциальных парных корреляционных функций. Учитывается вклад многократного рассеяния. Метод имеет довольно быструю сходимость и применен для получения информации о локальной атомной структуре твердых растворов Ge-Si

Additional details

Additional titles

Original title (Russian)
Кристаллические твердые растворы Ге

Publishing Information

Journal Title
Poverkhnost'. Rentgenovskie, Sinkhrotronnye i Nejtronnye Issledovaniya
Journal Issue
no.12
Journal Page Range
p. 66-69
ISSN
1028-0960

Conference

Title
14. Russian conference on application of synchrotron radiation SR-2002
Original Conference Title
XIV Rossijskaya konferentsiya po ispol'zovaniyu sinkhrotronnogo izlucheniya SI-2002
Dates
15-19 Jul 2002
Place
Novosibirsk (Russian Federation)

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
36052043
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ABSORPTION SPECTRA; ALGORITHMS; ATOMS; COMPARATIVE EVALUATIONS; CORRELATION FUNCTIONS; CRYSTAL STRUCTURE; CRYSTALS; FLUORESCENCE SPECTROSCOPY; GERMANIUM; GERMANIUM SILICIDES; ITERATIVE METHODS; MULTIPLE SCATTERING; SILICON; SOLID SOLUTIONS; X-RAY FLUORESCENCE ANALYSIS
Descriptors DEC
CALCULATION METHODS; CHEMICAL ANALYSIS; DISPERSIONS; ELEMENTS; EMISSION SPECTROSCOPY; EVALUATION; FUNCTIONS; GERMANIUM COMPOUNDS; HOMOGENEOUS MIXTURES; MATHEMATICAL LOGIC; METALS; MIXTURES; NONDESTRUCTIVE ANALYSIS; SCATTERING; SEMIMETALS; SILICIDES; SILICON COMPOUNDS; SOLUTIONS; SPECTRA; SPECTROSCOPY; X-RAY EMISSION ANALYSIS

Optional Information

Notes
9 refs., 1 fig., 2 tabs.