Structural and Physical Properties of Ca1-xSrxFe2As2 (0 ≤ x ≤ 1.0) and Ca0.5Sr0.5Fe2-yCoyAs2 (0 ≤ y ≤ 0.6)

被引：2

作者：

Shi, H. L. ^{[1
]}

Yang, H. X. ^{[1
]}

Tian, H. F. ^{[1
]}

Ma, C. ^{[1
]}

Lu, J. B. ^{[1
]}

Wang, Z. W. ^{[1
]}

Li, J. Q. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2010年 / 23卷 / 05期

关键词：

Superconductivity; SDW; Structural inhomogeneity; SUPERCONDUCTIVITY; EARTH; THCR2SI2;

D O I：

10.1007/s10948-010-0660-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The Ca1-xSrxFe2As2 (0 <= x <= 1) and Ca0.5Sr0.5 Fe1-yCoyAs2 (0 <= y <= 0.6) materials were prepared by a solid state reaction method. X-ray diffraction analysis shows that the lattice parameters of Ca1-xSrxFe2As2 decrease continuously with increasing Ca content. Resistivity measurements reveal that the Ca/Sr ratio has a visible influence on the resistivity anomaly associated with the spin-density-wave (SOW) instability. Experimental measurements on Ca0.5Sr0.5Fe2-yCoyAs2 show clear superconducting transitions for Co in range of 0.26 <= y <= 0.43; the highest critical transition temperature is found to be at about 17 K. Transmission electron microscopy (TEM) investigations on the superconducting Ca0.5Sr0.5Fe2-yCoyAs2 samples reveal visible inhomogeneous distribution of Sr and Ca elements, which could result in structural distortions and broaden superconducting transitions as observed in our experiments.

引用

页码：749 / 755

页数：7

共 31 条

[1] Coarse grained variables and deterministic chaos in an excitable system [J].

Avila, Jhon F. Martinez ;

Cavalcante, Hugo L. D. de S. ;

Leite, J. R. Rios .

PHYSICAL REVIEW LETTERS, 2008, 100 (04)

[2] Superconducting properties of the Fe-based layered superconductor LaFeAsO0.9F0.1-δ [J].

Chen, G. F. ;

Li, Z. ;

Li, G. ;

Zhou, J. ;

Wu, D. ;

Dong, J. ;

Hu, W. Z. ;

Zheng, P. ;

Chen, Z. J. ;

Yuan, H. Q. ;

Singleton, J. ;

Luo, J. L. ;

Wang, N. L. .

PHYSICAL REVIEW LETTERS, 2008, 101 (05)

[3] Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO1-xFxFeAs [J].

Chen, G. F. ;

Li, Z. ;

Wu, D. ;

Li, G. ;

Hu, W. Z. ;

Dong, J. ;

Zheng, P. ;

Luo, J. L. ;

Wang, N. L. .

PHYSICAL REVIEW LETTERS, 2008, 100 (24)

[4] Superconductivity in hole-doped (Sr1-xKx)Fe2As2 [J].

Chen Gen-Fu ;

Li Zheng ;

Li Gang ;

Hu Wan-Zheng ;

Dong Jing ;

Zhou Jun ;

Zhang Xiao-Dong ;

Zheng Ping ;

Wang Nan-Lin ;

Luo Jian-Lin .

CHINESE PHYSICS LETTERS, 2008, 25 (09) :3403-3405

[5] Coexistence of the spin-density wave and superconductivity in Ba1-xKxFe2As2 [J].

Chen, H. ;

Ren, Y. ;

Qiu, Y. ;

Bao, Wei ;

Liu, R. H. ;

Wu, G. ;

Wu, T. ;

Xie, Y. L. ;

Wang, X. F. ;

Huang, Q. ;

Chen, X. H. .

EPL, 2009, 85 (01)

[6] Superconductivity at 43 K in SmFeAsO1-xFx [J].

Chen, X. H. ;

Wu, T. ;

Wu, G. ;

Liu, R. H. ;

Chen, H. ;

Fang, D. F. .

NATURE, 2008, 453 (7196) :761-762

[7] NEW SERIES OF GERMANIDES, ISOTYPES OF U4RE7SI6, THCR2SI2 AND CABE2GE2, IN R-T-GE TERNARY-SYSTEMS WHERE R IS AN ELEMENT OF RARE-EARTHS AND T = RU, OS, RH, IR - SUPRACONDUCTIVITY OF LAIR2GE2 [J].

FRANCOIS, M ;

VENTURINI, G ;

MARECHE, JF ;

MALAMAN, B ;

ROQUES, B .

JOURNAL OF THE LESS-COMMON METALS, 1985, 113 (02) :231-237

[8] SrFeAsF as a parent compound for iron pnictide superconductors [J].

Han, Fei ;

Zhu, Xiyu ;

Mu, Gang ;

Cheng, Peng ;

Wen, Hai-Hu .

PHYSICAL REVIEW B, 2008, 78 (18)

[9] INFLUENCE OF COMPOSITION ON THE STRUCTURAL AND SUPERCONDUCTING PROPERTIES OF THE 2 POLYMORPHIC FORMS OF IRIDIUM-SUBSTITUTED OR SILICON-SUBSTITUTED YIR2SI2 [J].

HIRJAK, M ;

LEJAY, P ;

CHEVALIER, B ;

ETOURNEAU, J ;

HAGENMULLER, P .

JOURNAL OF THE LESS-COMMON METALS, 1985, 105 (01) :139-148

[10] SUPERCONDUCTING LARU2P2 AND OTHER ALKALINE-EARTH AND RARE-EARTH-METAL RUTHENIUM AND OSMIUM PHOSPHIDES AND ARSENIDES WITH THCR2SI2 STRUCTURE [J].

JEITSCHKO, W ;

GLAUM, R ;

BOONK, L .

JOURNAL OF SOLID STATE CHEMISTRY, 1987, 69 (01) :93-100

← 1 2 3 4 →