کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1595423 | 1515682 | 2009 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
11B and 89Y MAS NMR and magnetic characterization of Y B4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
11B and 89Y MAS NMR spectra at room temperature and magnetization in the temperature range (2-300Â K) were measured on a powder specimen of Y B4. The three different 11B Knight shifts (34.7, 12.6 and 5.4Â ppm) for the crystallographic sites B1(4e), B2(4h) and B3(8j), respectively, were observed in a magnetic field of 17.6 T. The 89Y isotropic Knight shift (294.6 ppm) and Kxx,Kyy and Kzz components of the Knight shift tensor have been determined. The spin-lattice relaxation times, T1(11B)=4.5s and T1(89Y)=5.5s, were measured at room temperature. Analysis of the magnetization data have indicated that Y B4 is a diamagnetic compound with the temperature independent component of its magnetic susceptibility equal to â5.9â10â9(m3/kg). Some of these data were referred to those of CaB4âxCx(x=0.21), LaB4,NdB4 and Y5Si2B8.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 149, Issues 17â18, May 2009, Pages 693-696
Journal: Solid State Communications - Volume 149, Issues 17â18, May 2009, Pages 693-696
نویسندگان
O.J. Å»ogaÅ, P. Florian, D. Massiot, S. Paluch, N. Shitsevalova, D.F. Borshchevsky,