On the propensity of magnetism in 3d transition-metal-MgCNi_3 alloys

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dc.creatorJoseph, P. Jiji Thomas
dc.creatorSingh, Prabhakar P.
dc.date2005-05-10
dc.date.accessioned2026-07-07T03:05:08Z
dc.date.available2026-07-07T03:05:08Z
dc.descriptionThe changes in the electronic properties of the substitutionally disordered MgC(Ni_{1-x}T_{x})_{3} (T=Fe, Co or Cu) alloys are studied using the atomic sphere formulation of the Korringa-Kohn-Rostoker coherent-potential approximation method (KKR-ASA CPA), while the effects of incipient magnetism in these alloys are studied phenomenologically using Ginzburg-Landau coefficients in conjunction with fixed-spin moment method. We find that the disordered MgC(Ni_{1-x}T_{x})_{3} alloys have a small magnetic moment localized at Fe and Co sites for low concentrations. The overestimation of the calculated magnetic moment is likely to be due to the limitations of the local-density approximation used in the present study. However, the calculated Ginzburg-Landau coefficients clearly show that the disordered MgC(Ni_{1-x}T_{x})_{3} alloys remain paramagnetic. At expanded volumes, we also find the possibility of a ferromagnetic state for MgC(Ni_{0.95}Fe_{0.05})_{3} and MgC(Ni_{0.90}Co_{0.10})_{3}.
dc.identifierhttps://arxiv.org/abs/cond-mat/0505235
dc.identifierhttp://arxiv.org/abs/cond-mat/0505235
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26340
dc.subjectMaterials Science
dc.subjectSuperconductivity
dc.titleOn the propensity of magnetism in 3d transition-metal-MgCNi_3 alloys
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