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Superconductivity in the Th0.93Zr0.07B12 compound with UB12 prototype structure

  • Author(s): Renosto, ST
  • Corrêa, LE
  • Da Luz, MS
  • Rosa, PFS
  • Fisk, Z
  • Albino-Aguiar, J
  • Machado, AJS
  • et al.

In this work, we report superconductivity at 5.5 K in the new pseudo-ternary Th Zr B compound. We show clearly evidence that appropriate amounts of Zr substitution at the Th site induce the stabilization of the UB prototype structure at ambient pressure. The superconducting bulk properties of Th Zr B are confirmed by means of magnetization, electronic transport properties and specific heat measurements. The H-T phase diagrams based on magnetization and magnetoresistance measurements yield μ H (0)=6 mT and μ H (0)=98 mT and allow us to estimate the coherence length ξ ∼57.9 nm and the penetration depth λ ∼234 nm at zero kelvin. 0.93 0.07 12 12 0.93 0.07 12 0 c1 0 c2 o L

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