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Structural Distortion and Magnetic Order in the Intermetallic {\hbox {Eu}}_{3}{\hbox {Ir}}_{4}{\hbox {Sn}}_{13} Compound

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9 Author(s)
Jose R. L. Mardegan$^{1}$ Instituto de Física “Gleb Wataghin”, Universidade Estadual de Campinas,, UNICAMP , Campinas , Brazil ; Nadir Aliouane ; Leticia N. Coelho ; Oscar Agüero
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In this work, we have investigated the low temperature structural distortion and magnetic properties of the Eu3Ir4Sn13 Remeika cubic phase compound using X-ray powder diffraction (XRD), X-ray resonant magnetic scattering (XRMS) and neutron diffraction. X-ray scattering revealed that the peak observed in electrical resistivity and heat capacity measurements is related to a structural distortion at T*=57.1 K. This crystallographic distortion characterized by the arising of a propagation vector q=(0,(1/2),(1/2)) is due to a displacement of the Sn ions at the Sn1Sn212 polyhedron. In addition, the neutron diffraction experiments performed on a single crystal of Eu3Ir4Sn13 exhibit an antiferromagnetic coupling below TN=10.1 K where we observe a commensurate magnetic propagation vector τ=(0,(1/2),(1/2)) identical to the one observed for the structural distortion.

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IEEE Transactions on Magnetics  (Volume:49 ,  Issue: 8 )