Abstract
The pseudoternary system Dy(RuxRh1−x)4B4 has been studied by means of ac magnetic susceptibility, electrical resistance, heat capacity, static magnetic susceptibility, and magnetization measurements. A low-temperature phase diagram was determined for the range of concentrations 0.1<x≤1. Superconductivity occurs forx≲0.35, with a sharp depression of the superconducting critical temperature nearx∼0.3. Long-range magnetic order exists for all concentrationsx; the rhodium-rich compounds exhibit antiferromagnetism, while the ruthenium-rich compounds are ferromagnetic. Pseudoternary compounds near the critical limit possibly exhibit reentrant antiferromagnetic superconductivity, a hitherto unobserved phenomenon. The competition between antiferromagnetism and ferromagnetism apparently leads to a mixed phase in a comparatively wide range of concentrations.
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Research supported by the U.S. Department of Energy under Contract No. DE-AT03-76-ER70227.
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Hamaker, H.C., Maple, M.B. Superconductivity and magnetism in the pseudoternary system Dy(Rux Rh 1−x)4B4 . J Low Temp Phys 51, 633–653 (1983). https://doi.org/10.1007/BF00683232
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DOI: https://doi.org/10.1007/BF00683232