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- W2988816626 abstract "The investigation of layered intermetallic compounds containing light elements like hydrogen has great potential for superconductivity. We studied the insertion of carbon atoms in CeScSi-type intermetallics (an ordered variant of the La2Sb structure type), and here, we report the new carbide NdScSiC0.5. Carbon insertion keeps the pristine compound’s space group, I4/mmm, but causes an anisotropic expansion of the unit cell with an increase in the a parameter and a decrease of the c parameter. X-ray and neutron diffraction measurements indicate the existence of a NdScSiCx solid solution (0.2 < x ≤ 0.5) with carbon atoms occupying only the Sc4Nd2 octahedral sites while leaving the Nd4 tetrahedral sites vacant. Magnetization measurements unveil a linear reduction of the ferromagnetic ordering temperature from TC = ∼171 K to ∼50 K with increasing carbon content. The ferromagnetic structures of the pristine NdScSi and the filled NdScSiC0.5 have been determined from neutron diffraction measurements. Finally, we discuss the effect of carbon versus hydrogen insertion on electronic and magnetic properties based on density functional theory calculations. Although the unpaired spin density channels between Nd and Sc atoms (responsible of the high Curie temperature in NdScSi) are reduced upon carbon insertion, the strong Nd–C interaction, linked to a reduced c lattice parameter in NdScSiC0.5, ensures a strong magnetic coupling between the Nd double layer along the c axis and the ferromagnetic order is preserved." @default.
- W2988816626 created "2019-11-22" @default.
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- W2988816626 date "2019-11-01" @default.
- W2988816626 modified "2023-10-10" @default.
- W2988816626 title "Effect of Carbon Insertion on the Structural and Magnetic Properties of NdScSi" @default.
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- W2988816626 doi "https://doi.org/10.1021/acs.inorgchem.9b02260" @default.
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