کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1804832 | 1024658 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
EPR and optical study of Mn2+-doped lithium hydrogen oxalate monohydrate single crystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
EPR study of Mn2+-doped lithium hydrogen oxalate monohydrate single crystals are done at room temperature. The Mn2+ spin-Hamiltonian parameters are evaluated employing a large number of resonant line positions observed for different orientations of the external magnetic field. The values of g, A, B, D, E and a are 1.9942±0.0002, 114±2Ã10â4, 103±2Ã10â4, 180±2Ã10â4, 57±2Ã10â4 and 7±1Ã10â4 cmâ1, respectively. The optical absorption study of the crystal is also done. The observed bands are assigned as transitions from the 6A1g(S) ground state to various excited quartet levels of Mn2+ ion in a cubic crystalline field. These bands are fitted with four parameters, inter-electronic repulsion parameters (B and C), crystal field parameter (Dq) and Tree's correction (α). The values found for the parameters are B=814 cmâ1, C=2255 cmâ1, Dq=780 cmâ1, and α=76 cmâ1. On the basis of the data obtained, the surrounding crystalline field and the nature of metal-ligand bonding are discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 308, Issue 2, January 2007, Pages 243-249
Journal: Journal of Magnetism and Magnetic Materials - Volume 308, Issue 2, January 2007, Pages 243-249
نویسندگان
Ram Kripal, Har Govind, Manju Maurya,