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

Author(s)

Renosto, S. T. ^[1] ; Correa, L. E. ^[1] ; da Luz, M. S. ^{[1, 2]} ; Rosa, P. F. S. ^[3] ; Fisk, Z. ^[3] ; Albino-Aguiar, J. ^[4] ; Machado, A. J. S. ^[1]

Affiliation

^[1] Univ Sao Paulo Lorena, Escola Engn Lorena, Dept Engn Mat, BR-12602810 Lorena, SP - Brazil

^[2] Univ Fed Triangulo Mineiro, Dept Engn Ambiental, Inst Ciencias Exatas & Tecnol, BR-38066200 Uberaba, MG - Brazil

^[3] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 - USA

^[4] Univ Fed Pernambuco, Dept Fis, BR-38066200 Recife, PE - Brazil

• Document type: Journal article
• Source: Physics Letters A; v. 379, n. 39, p. 2498-2501, OCT 16 2015.
• Web of Science Citations: 4

Abstract

In this work, we report superconductivity at 5.5 K in the new pseudo-ternary Th0.93Zr0.07B12 compound. We show clearly evidence that appropriate amounts of Zr substitution at the Th site induce the stabilization of the UB12 prototype structure at ambient pressure. The superconducting bulk properties of Th0.93Zr0.07B12 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 mu H-0(c1) (0) = 6 mT and mu H-0(c2)(0) = 98 mT and allow us to estimate the coherence length xi(0) similar to 57.9 nm and the penetration depth lambda(L) similar to 234 nm at zero kelvin. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/20181-0 - Evolution of topological Kondo insulating behavior in Sm1xRxB6 (r = Sr, Yb)
• Grantee: Priscila Ferrari Silveira Rosa
• Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
• FAPESP's process: 14/01581-0 - Study of stabilization of the Th1-xMxB12 phase with UB12 prototype and experimental investigation of physical properties
• Grantee: Sérgio Tuan Renosto
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• FAPESP's process: 11/05961-3 - Study of superconductivity in diboride and dichalcogenates of transition metal (MeB2 and MeX2) with AlB2 prototype and its variations
• Grantee: Sérgio Tuan Renosto
• Support Opportunities: Scholarships in Brazil - Doctorate