Symmetry analysis of complex magnetic structure in monoclinically distorted ErCuSn.
作者信息
Baran Stanisław, Deptuch Aleksandra, Penc Bogusław, Hoser Andreas, Szytuła Andrzej
机构信息
M. Smoluchowski Institute of Physics, Jagiellonian University, prof. Stanisława Łojasiewicza 11, PL-30-348 Kraków, Poland.
Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, PL-31-342 Kraków, Poland.
出版信息
Acta Crystallogr B Struct Sci Cryst Eng Mater. 2021 Apr 1;77(Pt 2):219-224. doi: 10.1107/S205252062100127X. Epub 2021 Mar 11.
The magnetic structure in ErCuSn has been determined using high-resolution powder neutron diffraction, supported by symmetry analysis. At low temperatures, ErCuSn assumes a crystal structure of the TmCuSn type (in the monoclinic space group C2/m). The Er atoms occupy two distinct Wyckoff sites: 2c and 4i. It has been found that the Er magnetic moments on the 2c site form a commensurate antiferromagnetic structure (k = [0, 0, ½]) below 6 K. The magnetic moments reach 8.91 (8) μ at 1.4 K and are parallel to the b axis. The Er magnetic moments on the 4i site order below 2 K and form an incommensurate antiferromagnetic sine-modulated structure (k = [1, 0.4667 (1), ½]), with magnetic moments lying in the ac plane and perpendicular to the a axis. The amplitude of modulation equals 8.7 (1) μ at 1.4 K.
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