Directional frustration of magnetic moments in (U0.50Dy0.50)Ni2B2C |
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Authors: | Ant nio P. Gon alves, Laura C. J. Pereira, Paulo A. S. Silva, Margarida Godinho, Manuel Almeida,Moshe Kuznietz |
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Affiliation: | António P. Gonçalves, Laura C. J. Pereira, Paulo A. S. Silva, Margarida Godinho, Manuel Almeida,Moshe Kuznietz , |
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Abstract: | Polycrystalline (U0.50Dy0.50)Ni2B2C solid solution was prepared and found by X-ray diffraction to crystallize in BCT LuNi2B2C-type structure (space group I4/mmm) of the end compounds UNi2B2C and DyNi2B2C. AC susceptibility and magnetization show paramagnetic behavior down to 6.5 K, with the values θ=−5(5) K and μeff=7.7(1) μB, compatible with those of the end compounds, and indicate possible cooperative phenomena at lower temperatures. The observed paramagnetism, at variance with antiferromagnetic ordering in (Pr0.50Dy0.50)Ni2B2C, is attributed to a directional frustration of the magnetic moments on the (U,Dy) site. |
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Keywords: | Quaternary borocarbides Antiferromagnetism Paramagnetism Directional frustration |
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