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Magnetic and magnetocaloric properties of the new R3Co4+xAl12-x (R: Tb → Er) with the Gd3Ru4Al12 structure-type

Abstract : The novel intermetallics R3Co4+xAl12-x (R = Tb → Er) crystallize in the hexagonal Gd3Ru4Al12 structure-type where the rare earth atoms form a heavily distorted kagome network. Single crystal X-ray diffraction reveals an unusual 2b substitution site of Co for Al probably driven by steric effects. The four phases order ferromagnetically below 24.0, 17.4, 11.5 and 5.0 K for R = Tb, Dy, Ho and Er, respectively, linearly decreasing with the de Gennes factor of the rare earth. The magnetocaloric properties have been estimated for R = Ho and Er by measuring the magnetization isotherms at various temperatures. The magnetic entropy changes reach maximum values of −12 and −10 J kg−1 K−1 for a magnetic field change from 5 to 0 T. © 2017 Elsevier Ltd
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01581232
Contributor : Laurent Jonchère <>
Submitted on : Monday, September 4, 2017 - 2:38:52 PM
Last modification on : Friday, July 10, 2020 - 4:10:17 PM

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M. Pasturel, N. Nasri, T. Guizouarn, B. Belgacem, R. Ben Hassen, et al.. Magnetic and magnetocaloric properties of the new R3Co4+xAl12-x (R: Tb → Er) with the Gd3Ru4Al12 structure-type. Intermetallics, Elsevier, 2017, 90, pp.74--80. ⟨10.1016/j.intermet.2017.07.005⟩. ⟨hal-01581232⟩

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