کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10653370 | 1002871 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
ESR and optical study of Mn2+ doped potassium hydrogen sulphate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The ESR spectrum of Mn2+ doped potassium hydrogen sulphate at liquid nitrogen temperature (77 K) has been analyzed and site of entered Mn2+ in the lattice has been discussed. The values of the zero field parameters that give good fit to the observed ESR spectra have been obtained. The obtained g, A, B, D, E and a values are 2.0002, 66Ã10â4 cmâ1, 26Ã10â4 cmâ1, 59Ã10â4 cmâ1, 32Ã10â4 cmâ1 and â8Ã10â4 cmâ1, respectively. The percentage of covalency of the metal-ligand bond has also been estimated. From the optical absorption study at room temperature, the distortion has been suggested. 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. The electron repulsion and crystal field parameters B, C, Dq and α providing good fit to the observed optical spectra have been evaluated and the values obtained for the parameters are B=627 cmâ1, C=2580 cmâ1 , Dq=790 cmâ1 and α=76 cmâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 133, Issue 1, January 2005, Pages 23-28
Journal: Solid State Communications - Volume 133, Issue 1, January 2005, Pages 23-28
نویسندگان
Ram Kripal, Vishal Mishra,