کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10632018 | 992377 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystal structure and properties of the new complex vanadium oxide K2SrV3O9
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The new complex vanadium oxide K2SrV3O9 has been synthesized and investigated by means of X-ray powder diffraction (XPD), electron microscopy and magnetic susceptibility measurements. The oxide has an orthorhombic unit cell with lattice parameters a = 10.1922(2) Ã
, b = 5.4171(1) Ã
, c = 16.1425(3) Ã
, space group Pnma and ZÂ =Â 4. The crystal structure of K2SrV3O9 has been refined by Rietveld method using X-ray powder diffraction data. The structure contains infinite chains built by V4+O5 square pyramids linked to each other via VO4 tetrahedra. The chains form layers and potassium and strontium cations orderly occupy structural interstices between these layers. Electron diffraction as well as high resolution electron microscopy confirmed the structure solution. Magnetic susceptibility measurements revealed an antiferromagnetic interaction with J of the order of 100Â K inside the chains and no long-range magnetic order above 2Â K. The origin of the magnetic exchange is likely a result of super-exchange interaction through the two VO4 tetrahedra linking the polyhedra with the magnetic V4+ cations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 40, Issue 5, 18 May 2005, Pages 800-809
Journal: Materials Research Bulletin - Volume 40, Issue 5, 18 May 2005, Pages 800-809
نویسندگان
Alexander A. Tsirlin, Victoria V. Chernaya, Roman V. Shpanchenko, Evgeny V. Antipov, Joke Hadermann,