کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1332729 | 979052 | 2008 | 7 صفحه PDF | دانلود رایگان |
A2MnB′O6 (A=Ca, Sr; B=Sb, Ta) double perovskites have been synthesized and their structural and magnetic properties have been investigated. Rietveld refinement of the powder X-ray diffraction data for Sr2MnSbO6 indicated significant ordering of Mn and Sb at the B-site while all other phases showed mostly a random distribution of the B-site cations. X-ray absorption spectroscopic data established the presence of Mn in the 3+ and Sb/Ta in the 5+ oxidation states in all the phases. Magnetic susceptibility data indicated ferromagnetic correlations for all the A2MnB′O6 phases with Weiss temperatures varying from 64 to 107 K.
The M vs. H plots for the ordered Sr2MnSbO6. The magnetization data at 5 K shows hysteresis loop (inset) with a Brillouin-like curvature indicating significant ferromagnetic correlations in the system.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 181, Issue 9, September 2008, Pages 2325–2331