Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 400, Issue -, Pages 125-129Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2015.07.066
Keywords
First-order transition; Magneto-elastic coupling; Thermal expansion; Low-temperature X-ray diffraction
Funding
- Czech Research Infrastructures [LM2011025]
- Austrian Science Fund (FWF) [J3523-N27]
- Czech Science Foundation [14-081245]
- Austrian Science Fund (FWF) [J3523] Funding Source: Austrian Science Fund (FWF)
- Austrian Science Fund (FWF) [J 3523] Funding Source: researchfish
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Structural changes through the first-order paramagnetic-antiferromagnetic phase transition of Dy3Ru4Al12 at 7 K have been studied by means of X-ray diffraction and thermal expansion measurements. The compound crystallizes in a hexagonal crystal structure of Gd3Ru4Al12 type (P6(3)/mmc space group), and no structural phase transition has been found in the temperature interval between 2.5 and 300 K. Nevertheless, due to the spin-lattice coupling the crystal volume undergoes a small orthorhombic distortion of the order of 2 x 10(-5) as the compound enters the antiferromagnetic state. We propose that the first-order phase transition is not driven by the structural changes but rather by the exchange interactions present in the system. (C) 2015 Elsevier B.V. All rights reserved.
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