Magnetic structures of Ce₂Pd_1−xCo_xSi₃ (x = 0.0, 0.2, 0.4, 0.6) compounds

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• 作者：Wawrzynska ; E. ; Keller ; L. ; Sampathkumaran ; E.V. ; Szytula ; A.
• 关键词：Rare earth compounds ; Transition metal compounds ; Magnetically ordered materials ; Neutron diffraction ; Magnetic measurements ; Magnetic structures
• 刊名：Journal of Alloys and Compounds
• 出版年：2004
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：June 30, 2004
• 卷：373
• 期：1-2
• 页码：73-77
• 文件大小：220 K

摘要

Polycrystalline samples of Ce₂Pd_1−xCo_xSi₃ for x equal to 0.0, 0.2, 0.4 and 0.6 have been studied by neutron diffraction. All these compounds exhibit a hexagonal crystal structure of the AlB₂-type. In Ce₂PdSi₃ below 3.5K, features attributable to short-range magnetic order are observed. The neutron diffraction patterns for the other compositions are typical of simple magnetic structures described by an orthorhombic unit cell (a, √3a, c).The magnetic moment at low temperatures equals 0.37(14)μ_B at 1.6K for x=0.2, 1.27(5)μ_B at 1.6K for x=0.4 and 0.55(8)μ_B at 1.85K for x=0.6. The moments are parallel to the b-axis of the orthorhombic magnetic unit cell.