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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Evidence of multiband behavior in a new superconductor Ta0.8Zr0.2B with FeB-prototype structure

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Author(s):
Correa, L. E. [1] ; Nova, J. C. C. [1] ; de Faria, L. R. [1] ; Santos, F. B. [1] ; de Lima, B. S. [1, 2] ; Nunes, C. A. [1] ; Coelho, G. C. [1] ; Rogl, P. [3] ; Fisk, Z. [4] ; Machado, A. J. S. [1]
Total Authors: 10
Affiliation:
[1] Univ Sao Paulo, Escola Engn Lorena, POB 116, BR-12602810 Lorena - Brazil
[2] Univ Sao Paulo, Sao Carlos Inst Phys, BR-565905 Sao Carlos, SP - Brazil
[3] Univ Vienna, Inst Mat Chem, Wahringerstr 42, A-1090 Vienna - Austria
[4] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 - USA
Total Affiliations: 4
Document type: Journal article
Source: Journal of Alloys and Compounds; v. 803, p. 597-600, SEP 30 2019.
Web of Science Citations: 0
Abstract

We present results that show a relation between crystalline structure and superconductivity in the Ta1-xZrxB system. The substitution of Ta for Zr atoms induces a crystal structure change from CrB- to FeB-prototype structure in which superconductivity is present with higher superconducting critical temperature T-c. The interrelation between T-c and Zr content shows a dome-like behavior with maximum T-c at x = 0.2. In this sample, bulk superconductivity was observed and characterized by magnetization, electrical resistivity and specific heat measurements, all consistent with a superconducting critical temperature close to 7.8 K. The upper and lower critical field diagrams have no usual behavior which may be connected to a multiband scenario. (C) 2019 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 16/11774-5 - Study of superconductivity and magnetism in compounds which crystallize on the YbMo2Al4 and IrIn3 prototype structure
Grantee:Antonio Jefferson da Silva Machado
Support Opportunities: Regular Research Grants
FAPESP's process: 16/11565-7 - Investigation of the superconductivity and magnetism in compounds that crystallize on the YbMo2Al4 and IrIn3 prototype
Grantee:Frederico Benedetto Santos
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 18/08819-2 - Growth of single crystals of CdI2 prototype dicalcogens and investigation of superconducting properties
Grantee:Lucas Eduardo Corrêa
Support Opportunities: Scholarships in Brazil - Doctorate