Magnetoelastic coupling in triangular lattice antiferromagnet CuCrS2
Julia C. E. Rasch, Martin Boehm, Clemens Ritter, Hannu Mutka, J\"urg, Schefer, Lukas Keller, Galina M. Abramova, Antonio Cervellino, J\"org F., L\"offler
TL;DR
This paper investigates how magnetic ordering in CuCrS2 causes lattice distortions, demonstrating magnetoelastic coupling in a geometrically frustrated triangular lattice antiferromagnet.
Contribution
It provides experimental evidence of magnetoelastic coupling and lattice distortion at the magnetic transition in CuCrS2, a triangular lattice antiferromagnet.
Findings
Monoclinic lattice distortion occurs at the magnetic transition.
Neutron and synchrotron diffraction confirm magnetoelastic coupling.
CuCrS2 helps understand magnetism's role in relieving geometrical frustration.
Abstract
CuCrS2 is a triangular lattice Heisenberg antiferromagnet with a rhombohedral crystal structure. We report on neutron and synchrotron powder diffraction results which reveal a monoclinic lattice distortion at the magnetic transition and verify a magnetoelastic coupling. CuCrS2 is therefore an interesting material to study the influence of magnetism on the relief of geometrical frustration.
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