کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9781687 | 1511635 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Local order and structural transitions in the molecule-based layer ferrimagnet (n-C4H9)4N FeIIFeIII(C2O4)3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Local structural order and temperature-dependent structural variation have been studied in the molecular-based layer ferrimagnet (n-C4H9)4N FeIIFeIII(C2O4)3 by EXAFS and high resolution X-ray powder diffraction. The EXAFS spectra measured at the Fe K-edge are successfully modelled by successive O, C, O and metal shells, showing that even when there is extensive structural disorder due to stacking faults, the local structural order in this class of ferrimagnets is fully retained. In this salt, which shows remarkable negative magnetisation at low temperature (Néel class Q), the EXAFS Debye-Waller factor has a discontinuity at 40Â K, corresponding to one found in the magnetisation. At the same temperature there is also a change in the expansion of the lattice as evidenced by the high resolution X-ray powder diffraction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 6, June 2005, Pages 932-935
Journal: Journal of Physics and Chemistry of Solids - Volume 66, Issue 6, June 2005, Pages 932-935
نویسندگان
Ian D. Watts, Simon G. Carling, Peter Day, Dirk Visser,