کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1613071 1516311 2014 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Lattice deformation of wurtzite MgxZn1−xO alloys: An extended X-ray absorption fine structure study
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Lattice deformation of wurtzite MgxZn1−xO alloys: An extended X-ray absorption fine structure study
چکیده انگلیسی

Synchrotron extended X-ray absorption fine structure (EXAFS) of Zn K-edge and X-ray diffraction (XRD) have been employed to study the lattice deformation of wurtzite MgxZn1−xO alloys (0 ⩽ x ⩽ 0.14) grown on sapphire substrates by metalorganic chemical vapor deposition (MOCVD). Our results reveal that Mg concentration increasing leads to the enhancement of σ-bonding of Zn–O and lattice constant a while resulting in depression of π-bonding of Zn–O and lattice constant c. With increasing from x = 0 to x = 0.14, the c/a ratio significantly decreases from 1.6014 to 1.5906, while the internal parameter u decreases only slightly from 0.3826 to 0.3820. This suggests that the u has a much smaller sensitivity for dilute Mg substitution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 582, 5 January 2014, Pages 157–160
نویسندگان
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