کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1601225 | 1005188 | 2009 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Crystal structure and physical properties of EPCo4.7Ge9 (EPÂ =Â Sr, Ba, Eu)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
BaCo4.7Ge9 (BaCo5âxGe9, x = 0.29) is a novel ternary compound which forms incongruently from the melt and crystallizes in a unique structure type (space group Pnma; a = 1.39910(2), b = 0.40218(2), c = 1.69882(2) nm, Z = 4). Isotypic compounds were found with SrCo4.7Ge9 (a = 1.39389(8), b = 0.39665(1), c = 1.67860(9) nm) and EuCo4.7Ge9 (a = 1.3910(1), b = 0.39425(2), c = 1.6741(2) nm). Physical properties (electrical resistivity, specific heat, magnetic susceptibility) were studied for BaCo4.7Ge9 and EuCo4.7Ge9. BaCo4.7Ge9 shows metallic behaviour but neither a superconducting nor a magnetic phase transition was observed for temperatures as low as T = 2 K. Magnetic susceptibility and specific heat data of EuCo4.7Ge9, evidence the onset of antiferromagnetic order at 18.5 K. Both magnetic ordering and the effective magnetic moment derived verify the Eu2+ state with a total angular momentum j = 7/2.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 17, Issue 6, June 2009, Pages 471-476
Journal: Intermetallics - Volume 17, Issue 6, June 2009, Pages 471-476
نویسندگان
N. Nasir, N. Melnychenko-Koblyuk, A. Grytsiv, P. Rogl, E. Bauer, E. Royanian, H. Michor, G. Hilscher, G. Giester,