کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1594721 | 1515702 | 2008 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Chemical synthesis, structural elucidation and quantum-chemical modeling of a Cr3+ doped gallium oxynitride prepared by precursor nitridation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Chemical synthesis, structural elucidation and quantum-chemical modeling of a Cr3+ doped gallium oxynitride prepared by precursor nitridation Chemical synthesis, structural elucidation and quantum-chemical modeling of a Cr3+ doped gallium oxynitride prepared by precursor nitridation](/preview/png/1594721.png)
چکیده انگلیسی
Chromium doped gallium oxynitrides having the wurtzite structure were prepared by ammonia nitridation of oxide precursors derived via the citrate route. The solid solution limits of less than 1 at.% Cr3+ were confirmed by both XRD and EXAFS on the nitrided product at 750Â âC in the wurtzite-type crystal lattice. The doped product was paramagnetic with a small amount of an antiferromagnetic impurity, but there was no ferromagnetic interaction among the doped Cr3+ ions in the gallium oxynitride. Density-functional electronic structure calculations on the basis of a wurtzite-type supercell containing 194 atoms reveal the oxynitride material to be metastable, and confirm the presence of spin-polarized Cr3+ cations located exactly on former Ga3+ tetrahedral sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 147, Issues 1â2, July 2008, Pages 41-45
Journal: Solid State Communications - Volume 147, Issues 1â2, July 2008, Pages 41-45
نویسندگان
Shinichi Yamamoto, Shinichi Kikkawa, Yuji Masubuchi, Takashi Takeda, Holger Wolff, Richard Dronskowski, Akira Yoshiasa,