Superconductivity at 9.5 K in the Ti2GeC compound

Author(s)

Bortolozo, A. D. ; Sant'Anna, O. H. ; dos Santos, C. A. M. ; Machado, A. J. S.

• Document type: Journal article
• Source: MATERIALS SCIENCE-POLAND; v. 30, n. 2, p. 6-pg., 2012-06-01.

Abstract

We report on the investigation of the Ti2GeC properties by X-ray diffraction, magnetic and electrical resistivity measurements. Polycrystalline samples of Ti2GeC with nominal compositions were prepared by solid state reaction. X-ray powder patterns suggest that all peaks can be indexed with the hexagonal phase of Cr2AlC prototype. The temperature dependence of both electrical resistivity and magnetization indicate a bulk type-II superconductivity at 9.5 K. Magnetoresistive data suggest an upper critical field of B-c2 similar to 8.1 T and coherence length similar to 61 A degrees . Furthermore, the results highlight the highest critical temperature reported up to now for an H-phase. (AU)

• FAPESP's process: 09/00610-8 - Investigation of magnetism and superconductivity in the new alloy of Fe-Se-X and Mg-Ce-X interstitial system
• Grantee: Ausdinir Danilo Bortolozo
• Support Opportunities: Research Grants - Young Investigators Grants