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

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

Abstract

The T2 phase is a characteristic phase of the Mr5(Si or Ge)3-xBx, where Mr represents refractory metals and crystallizes in the Cr5B3 prototype structure. Superconductivity has been reported in the T2 phase recently in Mo5SiB2, W5SiB2, and Nb5Si3-cBx compounds. These discoveries open new possibilities for 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 present superconductivity with a critical temperature close to 3.4 K. Will discuss that the principal goal will be the determination of the T2 composition in the Ta-Ge-B system. Besides the determination of a new superconducting phase, the success of this work will allow an understanding of the equilibrium of some phases in the Ta-Ge-B system.(AU)

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. (11/21884-9, 14/01581-0, 11/05961-3, 13/20181-0)