کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5407422 1393216 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Exchange-mediated spin-lattice relaxation of Fe3+ ions in borate glasses
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Exchange-mediated spin-lattice relaxation of Fe3+ ions in borate glasses
چکیده انگلیسی
Spin-lattice relaxation times (T1) of two borate glasses doped with different concentrations of Fe2O3 were measured using the Electron Spin-Echo (ESE) technique at X-band (9.630 GHz) in the temperature range 2-6 K. In comparison with a previous investigation of Fe3+-doped silicate glasses, the relaxation rates were comparable and differed by no more than a factor of two. The data presented here extend those previously reported for borate glasses in the 10-250 K range but measured using the amplitude-modulation technique. The T1 values were found to depend on temperature (T) as Tn with n ∼ 1 for the 1% and 0.1% Fe2O3-doped glass samples. These results are consistent with spin-lattice relaxation as effected by exchange interaction of a Fe3+ spin exchange-coupled to another Fe3+ spin in an amorphous material.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 185, Issue 1, March 2007, Pages 38-41
نویسندگان
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