کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5447561 1511500 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The investigation of the defect structures for Co2+ in ZnO microwires, thin films and bulks
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
The investigation of the defect structures for Co2+ in ZnO microwires, thin films and bulks
چکیده انگلیسی


- The defect structures for Co2+ in ZnO microwires, thin films and bulks are theoretically investigated.
- Co2+ suffer the trigonal distortions away from the ligand triangles along the C3 axis due to Jahn-Teller effect.
- The contributions of the charge-transfer (CT) mechanism are taken into account.
- The defect structures and spectral properties of the three ZnO:Co2+ systems are discussed.

The defect structures for Co2+ in ZnO microwires, thin films and bulks are theoretically investigated by analyzing the electron paramagnetic resonance (EPR) parameters (zero-field splitting D, g factors g// and g⊥ and hyperfine structure constants A// and A⊥) for trigonally distorted tetrahedral 3d7 clusters in a consistent way. The impurities Co2+ are found to suffer the displacements (≈0.046, 0.044 and 0.045 Å) away from the ligand triangles along the C3 axis in ZnO microwires, thin films and bulks, respectively, which considerably reduce the trigonal distortions of the Zn2+ sites in the hosts. Apart from the contributions from the conventional crystal-field (CF) mechanism, those from the charge-transfer (CT) mechanism are important and should be included in the EPR analysis. The defect structures and spectral properties of the three ZnO:Co2+ systems are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 106, July 2017, Pages 94-98
نویسندگان
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