کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1330194 | 978944 | 2005 | 9 صفحه PDF | دانلود رایگان |
The Ni3(PO4)2 phosphate was synthesized by the ceramic method in air atmosphere. The crystal structure consists of a three-dimensional skeleton constructed from Ni3O14 edge-sharing octahedra, which are interconnected by (PO4)3− oxoanions with tetrahedral geometry. The magnetic behavior was studied on powdered sample by using susceptibility, specific heat and neutron diffraction data. The nickel(II) orthophosphate exhibits a three-dimensional magnetic ordering at approximately 17.1 K. However, its complex crystal structure hampers any parametrization of the J-exchange parameter. The specific heat measurements of Ni3(PO4)2 exhibit a three-dimensional magnetic ordering (λ-type) peak at 17.1 K. Measurements above TN suggest the presence of a small short-range order in this phase. The total magnetic entropy was found to be 28.1 KJ/mol at 50 K. The magnetic structure of the nickel(II) phosphate exhibits ferromagnetic interactions inside the Ni3O14 trimers which are antiferromagnetically coupled between them, giving rise to a purely antiferromagnetic structure.
Magnetic structure of Ni3(PO4)2.Figure optionsDownload as PowerPoint slide
Journal: Journal of Solid State Chemistry - Volume 178, Issue 9, September 2005, Pages 2626–2634