Magnetotransport properties and Seebeck effect in the superconductor FeSe0.5Te0.5

被引：1

作者：

Pimentel, J. L., Jr. ^{[1
,2
]}

Pureur, P. ^{[1
]}

Vila, M. A. ^{[3
]}

Ribeiro, R. A. ^{[3
]}

机构：

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

[2] Univ Rio Grande FURG, Inst Matemt, Estatst Fsica, BR-96201900 Rio Grande, RS, Brazil

[3] Univ Fed ABC, CCNH, Estados, BR-09210580 Santo Andr, SP, Brazil

来源：

21ST LATIN AMERICAN SYMPOSIUM ON SOLID STATE PHYSICS (SLAFES XXI) | 2014年 / 480卷

关键词：

Fe-based superconductors; magneto-transport properties; Seebeck coefficient;

D O I：

10.1088/1742-6596/480/1/012016

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We carried out measurements of the electrical resistivity, magnetoresistance, Hall resistivity and Seebeck effect in a highly oriented sample of the Fe-based FeSe(0.5)Te(0.5)superconductor. Complementary structural and magnetic characterizations were also performed. Our sample do not show long-range magnetic order down to 4.2 K. Superconductivity occurs with critical temperature T-c similar or equal to 15 K. In the normal phase, the resistivity versus temperature behavior mimics that of a Kondo-lattice system. The magnetoresistance, Hall coefficient and Seebeck coefficient show sign reversals. These results are discussed with basis on the combined effects from two-band conduction and weak magnetic fluctuations. Effects from superconducting fluctuations are also observed near T-c.

引用

页数：5

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