کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1816281 | 1025681 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystal structure and magnetic properties of UFe3Al9
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
The ternary compound UFe3Al9 was synthesized by arc melting, followed by annealing at 850 °C. The crystal structure was determined by single-crystal X-ray diffraction and refined down to a residual value of R=0.043 (RW=0.099, S=0.89), with lattice parameters a=8.8373(2)Ã
and c=5.0738(2)Ã
. This phase is a new boundary composition in the extended range of solubility with general formula UFexAl12âx crystallizing in the tetragonal ThMn12-type structure, space group I4/mmm, with the iron atoms partially occupying the equivalent 8f positions. AC-susceptibility and magnetization measurements seem suggestive of a ferromagnetic type of transition at Tâ25K, but specific heat and 57Fe Mössbauer data indicate that neither long-range magnetic ordering nor standard spin-glass behaviour is associated with the magnetic anomaly. The presence of few iron-rich clusters with short-range ferromagnetic-like order at low temperatures is proposed for UFe3Al9.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 373, Issue 1, 1 March 2006, Pages 8-15
Journal: Physica B: Condensed Matter - Volume 373, Issue 1, 1 March 2006, Pages 8-15
نویسندگان
A.P. Gonçalves, L.C.J. Pereira, J.C. Waerenborgh, D.P. Rojas, M. Almeida, L. Havela, H. Noël,