کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1802259 | 1024593 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Theoretical study of electron paramagnetic resonance spectrum for Fe3+ ion in KMgF3:Fe3+ system
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Theoretical study of electron paramagnetic resonance spectrum for Fe3+ ion in KMgF3:Fe3+ system Theoretical study of electron paramagnetic resonance spectrum for Fe3+ ion in KMgF3:Fe3+ system](/preview/png/1802259.png)
چکیده انگلیسی
The electron paramagnetic resonance spectrum of the KMgF3:Fe3+ system has been studied on the basis of the complete energy matrices for the electron-electron repulsion, the ligand-field and the spin-orbit coupling of d5 configuration ion with a trigonal symmetry. A two-layer-ligand model, which includes six F- ions in the first layer and eight next nearest-neighbor K+ ions in the second layer, has been proposed to describe the real ligand-field. By simulating the second-order and fourth-order EPR parameters D and (a-F) simultaneously, a displacement of a K+ ion along C3-axis towards the Fe3+ ion has been found theoretically, and this displacement will give rise to the distortion of the octahedron constructed by six F- ligand ions in the first layer. ÎZ is used to describe the displacement of a K+ ion along C3-axis towards the Fe3+ ion, and two angles θ1 and θ2 between the Fe3+-F- band and C3-axis are taken to describe the local distortion along the [1 1 1] direction. By adjusting the ÎZ, the range of the local distortion parameters Îθ1=5.54â-6.07â, Îθ2=-4.60â to -5.00â are determined, and the EPR spectrum of the KMgF3:Fe3+ system has been satisfactorily explained by the two-layer-ligand model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 309, Issue 1, February 2007, Pages 113-118
Journal: Journal of Magnetism and Magnetic Materials - Volume 309, Issue 1, February 2007, Pages 113-118
نویسندگان
Ju-Fen Li, Xiao-Yu Kuang, Xiao-Fen Huang, Cheng Lu, Ai-Jie Mao,