Superconductivity in the Nb2SnC compound

被引：41

作者：

Bortolozo, A. D.

Sant'Anna, O. H.

da Luz, M. S.

dos Santos, C. A. M.

Pereira, A. S.

Trentin, K. S.

Machado, A. J. S.

机构：

[1] Grupo Supercondutividade, Dept Mat Engn, BR-12600970 Lorena, SP, Brazil

[2] Univ Fed Rio Grande do Sul, Escola Engn, BR-91501970 Porto Alegre, RS, Brazil

[3] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil

[4] Univ Fed Rio Grande do Sul, PGCIMAT, BR-91501970 Porto Alegre, RS, Brazil

来源：

SOLID STATE COMMUNICATIONS | 2006年 / 139卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

carbides; superconductivity; H-phase; high pressure synthesis;

D O I：

10.1016/j.ssc.2006.05.006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Nb2SnC is a member of the large family of lamellar materials that crystallize in the hexagonal structure with space group P6(3)/mmc, which are isomorphs with Cr2AlC, also named H-phase. In spite of the great number of compounds, which belong to this family, the superconductivity has been reported only for two cases: Mo2GaC and Nb2SC. In this work, we show that superconductivity can be observed in Nb2SnC depending on the synthesis method used. The quality of the superconductor is strongly dependent of the synthesis method and the optimal results were reached for samples synthesized at 2.5 GPa and 523 +/- 50 degrees C. This sample showed a critical temperature close to 7.8 K, revealed from magnetization and transport measurement, the highest critical temperature reported up to now for an H-phase. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：57 / 59

页数：3

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