Magnetic structures in UCuSn

Sami El-Khatib, Anna Llobet, Agus Purwanto, Robert A. Robinson, Seung Hun Lee, Jeffrey W. Lynn, Sung Chang, Heinz Nakotte

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We report neutron-diffraction results on UCuSn which crystallizes in the orthorhombic P 21 cn structure. This compound undergoes two magnetic transitions around TN =62 K and TM =25 K. At T=52 K, UCuSn exhibits a noncollinear arrangement of uranium moments of ∼1.5 μB U -atom with components in all three principal directions. Our diffraction data provide further evidence that the transition around 25 K is indeed magnetic in origin, although our refinements did not lead to a conclusive answer on its exact nature.

Original languageEnglish (US)
Article number08P704
JournalJournal of Applied Physics
Issue number8
StatePublished - 2006
Externally publishedYes

Bibliographical note

Funding Information:
This work has been supported by the NSF (Grant No. DMR-0094241), the Basic Energy Sciences Program of the Department of Energy, and the Department of Commerce. Work at the NIST utilized facilities supported in part by the National Science Foundation under Agreement No. DMR-0454672. The authors thank E. Fernandez for her help with some of the figures.


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