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- W2951567494 abstract "The new compounds, NdCoAl4, Nd2Co3Al9 and Sm2Co3Al9 have been prepared by arc-melting of the elemental components. The chemical and structural characterizations were carried out on both as-cast and annealed samples using X-ray diffractometry, metallographic analysis and EDS-microanalysis. The crystal structures of NdCoAl4 and Nd2Co3Al9 were refined from the single-crystal X-ray diffraction data, collected at room temperature. NdCoAl4 adopts the LaCoAl4 type of structure, crystallizing with the orthorhombic space group Pmma (no. 51), in a unit cell of dimensions: a = 7.6574(3) Å, b = 4.0401(1) Å, c = 6.8499(3) Å. Nd2Co3Al9 crystallizes in the orthorhombic space group Cmcm (n°63), with the lattice parameters: a = 12.8911(4) Å, b = 7.5594(2) Å, c = 9.4703(2) Å. Nd2Co3Al9 and Sm2Co3Al9 are isostructural to the Y2Co3Ga9-type. Magnetic susceptibility measurements, recorded in the temperature range 1.7–300 K, have revealed that all phases orders antiferromagnetically at low temperature. The Néel temperature are 2.8, 3.0 and 6 K for NdCoAl4, Nd2Co3Al9 and Sm2Co3Al9, respectively. At high temperature, the paramagnetic domain is dominated by the contribution of the rare-earth ions." @default.
- W2951567494 created "2019-06-27" @default.
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- W2951567494 date "2006-06-01" @default.
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- W2951567494 title "Crystal structures and magnetic properties of NdCoAl4, Nd2Co3Al9 and Sm2Co3Al9" @default.
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- W2951567494 doi "https://doi.org/10.1016/j.jallcom.2005.08.062" @default.
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