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Title: Magnetic structure and spin reorientation of quaternary Dy2Fe2Si2C
Authors: Susilo, RA
Cadogan, JM
Hutchison, WD
Stewart, GA
Avdeev, M
Campbell, SJ
Keywords: Temperature range 0065-0273 K
Specific heat
X-ray diffraction
Neutron diffraction
Magnetic moments
Monoclinic lattices
Issue Date: 7-Feb-2017
Publisher: IOP Publishing
Citation: Susilo, R. A, Cadogan, J. M., Hutchison, W. D., Stewart, G. A., Avdeev, M., & Campbell. S. J. (2017). Magnetic structure and spin reorientation of quaternary Dy2Fe2Si2C. Journal of Physics: Condensed Matter, 29(11), 115806. doi:10.1088/1361-648X/aa52f9
Abstract: We have investigated the low temperature magnetic properties of Dy2Fe2Si2C by using magnetisation, specific heat, x-ray diffraction, neutron powder diffraction and 57Fe Mössbauer spectroscopy measurements over the temperature range 1.5 K–300 K. Dy2Fe2Si2C exhibits two magnetic transitions at low temperatures: an antiferromagnetic transition at ${{T}_{\text{N}}}\sim 26$ K and a spin-reorientation transition at ${{T}_{t}}\sim 6$ K. The magnetic structure above Tt can be described with a propagation vector $\mathbf{k}~=~\left(0~0~\frac{1}{2}\right)$ with the ordering of the Dy magnetic moments along the monoclinic b-axis whereas on cooling below Tt the Dy moment tips away from the b-axis towards the ac-plane. We find that the spin-reorientation in Dy2Fe2Si2C is mainly driven by the competition between the second-order crystal field term B20 and the higher-order terms, in particular B40 and B64. © 2017 IOP Publishing Ltd
ISSN: 1361-648X
Appears in Collections:Journal Articles

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