Magnetic, structural and superconducting properties of MgC(Ni1 - xFe x)3

AUTOR(ES)

Alzamora, M., Sánchez, D. R., Cindra, M., Baggio-Saitovitch, E. M.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2002-09

RESUMO

X-ray diffraction, ac susceptibility and 57Fe Mössbauer spectroscopy measurements have been performed in the MgC(Ni1-xFe x )(0 <= x <= 0.5) series. The superconducting transition temperature Tc of the undoped sample, determined by ac susceptibility, is ~ 7K. The Fe doping quickly depresses Tc, completely destroying the superconducting state for x ~ 0.04. The establishment of an ordered magnetic state is only observed for Fe concentration (x > or = 0.3) far above the concentration for which the superconducting state has completely disappeared. An expansion of the lattice with the increase of the Fe content was observed.

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