Evolution of magnetism and superconductivity in the solid solutions Dy(CoxNi1-x)2B₂C and Er(CoxNi1-x)2B2C systems.
The Ni-based titled compounds are anti-ferromagnetic superconductors while the Co-based ones are normal magnetic ( DyCo2B2C is ferromagnetic while ErCo2B2C is a collinear antiferromagnetic). We intend to follow the evolution of their magnetic and electronic properties when Co is substituted for Ni. We have already synthesized twelve ııB enriched samples (x=0. 0.2, 0.4, 0.6, 0.8, 1 for each) of these two solid solutions and found out, as expected for these borocarbides, the ThCr2Si2;-type single phase is formed across the whole concentration range. Thermodynamic (magnetization, resistivity, specific heat) studies are underway to follow the evolution of their magnetic and electronic (in particular superconducting) properties. We are interested in mapping out the magnetic structure of these solid solution to see the evolution of the magnetic modes with the Co concentration: this is expected to shed light on the influence of Co substitution (mainly through the variation of the electron count) on the interplay between superconductivity and magnetism in these layered magnetic superconducting borocarbides.
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EL MASSALAMI Mohammed; JIMENEZ Adriana; OULADDIAF Bachir and ROTTER Martin. (2014). Evolution of magnetism and superconductivity in the solid solutions Dy(CoxNi1-x)2B₂C and Er(CoxNi1-x)2B2C systems.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2346
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