EXAFS Study of the Local Order in Cu
2ZnSn(S xSe 1–x) 4 Alloys
Anna Pietnoczka , Rajmund Bacewicz , Jerzy Antonowicz , S. Schorr , Galina Gurieva
Local structure in Cu2ZnSn(SxSe1–x)4 alloys is studied by the extended X-ray absorption fine structure (EXAFS) method. K edge absorption spectra of four elements: Cu, Zn, Sn, and Se have been measured. The EXAFS analysis of the nearest neighbor shell is performed using simultaneous fitting of the data for all four K edges. This provides value of structural parameters in the most consistent way. The cation–anion interatomic distances exhibit the bimodal behavior, i.e., the Me–S and Me–Se distances (Me = Cu, Zn, and Sn) are practically constant over the whole composition range of Cu2ZnSn(SxSe1–x)4 alloys. They are compared to the X-ray diffraction (XRD) values for these alloys. The analysis of the EXAFS Debye-Waller factors indicates differences in the static disorder around different cations with the lowest disorder observed in the first coordination shell of Sn atoms.
|Journal series||Physica Status Solidi B - Basic Solid State Physics, [Physica Status Solidi (B): Basic Research], ISSN 0370-1972, e-ISSN 1521-3951|
|Score||= 70.0, 19-12-2019, ArticleFromJournal|
|Publication indicators||= 0; : 2016 = 0.811; : 2018 = 1.454 (2) - 2018=1.528 (5)|
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