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Study of the superconducting properties of T2 phase on the Ta-Ge-B system

Grant number: 11/21884-9
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): January 01, 2012
Effective date (End): December 31, 2012
Field of knowledge:Engineering - Materials and Metallurgical Engineering
Principal Investigator:Antonio Jefferson da Silva Machado
Grantee:Lucas Eduardo Corrêa
Home Institution: Escola de Engenharia de Lorena (EEL). Universidade de São Paulo (USP). Lorena , SP, Brazil


The T2 phase is a characteristic phase of the Mr5(Si or Ge)3-xBx, where Mr represents refractory metals an crystallize in the Cr5B3 prototype structure. Superconductivity has been reported in the T2 phase recentely in Mo5SiB2, W5SiB2 and Nb5Si3-cBx compounds. These discoverys open new possiblity of the investigation of superconductivity in other compounds that crystallize in the T2 phase. In this context this project presents preliminary results which suggest a T2 phase in the Ta-Ge-B system that can be present superconductivity with critical temperature close to 3.4 K. Will be discuss that the principal goal will be determination of the T2 composition in the Ta-Ge-B ssystem. Besides the determination of a new supercomnducting phase, the sucess of this work will allow understand the equilibrium of the some phases in the Ta-Ge-B system.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CORREA, L. E.; DA LUZ, M. S.; DE LIMA, B. S.; CIGARROA, O. V.; DA SILVA, A. A. A. P.; COELHO, G. C.; FISK, Z.; MACHADO, A. J. S. Ta5GeB2: New T-2 superconductor phase. Journal of Alloys and Compounds, v. 660, p. 44-47, MAR 5 2016. Web of Science Citations: 3.

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