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Title: Spin-reorientation in DyGa
Authors: Susilo, RA
Cadogan, JM
Cobas, R
Muñoz-Pérez, S
Avdeev, M
Keywords: Coherent scattering
Crystal lattices
Crystal structure
Physical properties
Rare earths
Thermodynamic properties
Three-dimensional lattices
Transition temperature
Issue Date: 5-Feb-2014
Publisher: Australian Institute of Physics
Citation: Susilo, R. A., Cadogan, J. M., Cobas, R., Munoz-Perez, S. & Avdeev, M. (2014). Spin-reorientation in DyGa. Poster presented at the 38th Annual Condensed Matter and Materials Meeting 2014, Waiheke Island Resort, Waiheke, Auckland, New Zealand, 4th February - 7th February, 2014. Retrieved from:
Abstract: The RGa compounds crystallize in the orthorhombic CrB-type structure (Cmcm space-group), which can be viewed as a stacking of trigonal prisms along the crystallographic a-axis with rare earth atoms at the corners and the gallium atoms nearly at the centres. They order ferromagnetically with a Curie temperature ranging from a high of ~187 K in GdGa to a low of 15 K for TmGa. DyGa is a ferromagnet with a Curie temperature (TC) of 115(2) K. Based on single-crystal susceptibility measurements by Shohata, the easy direction of magnetic order was found to be along the c-axis. Recently, Zhang et al. reported a weak shoulder at ~25 K in their magnetization data, which might correspond to a spin-reorientation . In this report, we present our neutron diffraction results to investigate the magnetic ordering of DyGa. Despite the substantial neutron absorption by the Dy (50 at.% of the sample), refinement of our neutron diffraction patterns confirms the c-axis order below TC. Furthermore, upon cooling below 25 K we observe a canting of the Dy moments away from the c-axis towards the a-axis. At 3 K, the Dy moment is 9.8(2) µB and the Dy magnetic moments point in the direction θ = 22(2)° with respect to the crystallographic c-axis.
ISBN: 978-0-646-93339-9
Appears in Collections:Conference Publications

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