Premium
Symmetry analysis of complex magnetic structure in monoclinically distorted Er 3 Cu 4 Sn 4
Author(s) -
Baran Stanisław,
Deptuch Aleksandra,
Penc Bogusław,
Hoser Andreas,
Szytuła Andrzej
Publication year - 2021
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
ISSN - 2052-5206
DOI - 10.1107/s205252062100127x
Subject(s) - antiferromagnetism , magnetic structure , magnetic moment , crystal structure , neutron diffraction , monoclinic crystal system , symmetry (geometry) , crystallography , condensed matter physics , chemistry , physics , magnetic field , magnetization , geometry , mathematics , quantum mechanics
The magnetic structure in Er 3 Cu 4 Sn 4 has been determined using high‐resolution powder neutron diffraction, supported by symmetry analysis. At low temperatures, Er 3 Cu 4 Sn 4 assumes a crystal structure of the Tm 3 Cu 4 Sn 4 type (in the monoclinic space group C 2/ m ). The Er atoms occupy two distinct Wyckoff sites: 2 c and 4 i . It has been found that the Er magnetic moments on the 2 c site form a commensurate antiferromagnetic structure ( k 1 = [0, 0, ½]) below 6 K. The magnetic moments reach 8.91 (8) μ B at 1.4 K and are parallel to the b axis. The Er magnetic moments on the 4 i site order below 2 K and form an incommensurate antiferromagnetic sine‐modulated structure ( k 2 = [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 B at 1.4 K.