Superconductivity and magnetism in K-doped EuFe2As2

被引：35

作者：

Anupam ^{[1
]}

Paulose, P. L. ^{[2
]}

Jeevan, H. S. ^{[3
]}

Geibel, C. ^{[3
]}

Hossain, Z. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh, India

[2] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[3] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 26期

关键词：

LAYERED QUATERNARY COMPOUND; INTERPLAY;

D O I：

10.1088/0953-8984/21/26/265701

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Superconductivity is found in 50% K-doped EuFe2As2 samples below 33 K. Our results from electrical resistivity, magnetic susceptibility and Fe-57 and Eu-151 Mossbauer spectroscopy provide clear evidence that the ordering of the Fe moments observed at 190 K in undoped EuFe2As2 is completely suppressed in our 50% K-doped sample; thus there is no coexistence of the Fe magnetic order and the superconducting state. However, short range ordering of the Eu moments coexists with the superconducting state below 15 K. A bump in the susceptibility well below T-c as well as the broadening of the Fe Mossbauer line below 27 K evidence an interplay between the Eu magnetism and the superconducting state.

引用

页数：4

共 27 条

[1]

ALIREZA PL, 2008, ARXIV08071896

[2] 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)

[3]

Chen GF, 2008, CHINESE PHYS LETT, V25, P3403, DOI 10.1088/0256-307X/25/9/083

[4] 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

[5] Superconductivity and magnetism and their interplay in quaternary borocarbides RNi2B2C [J].

Gupta, L. C. .

ADVANCES IN PHYSICS, 2006, 55 (7-8) :691-798

[6] Electrical resistivity and specific heat of single-crystalline EuFe2As2:: A magnetic homologue of SrFe2As2 [J].

Jeevan, H. S. ;

Hossain, Z. ;

Kasinathan, Deepa ;

Rosner, H. ;

Geibel, C. ;

Gegenwart, P. .

PHYSICAL REVIEW B, 2008, 78 (05)

[7] High-temperature superconductivity in Eu0.5K0.5Fe2As2 [J].

Jeevan, H. S. ;

Hossain, Z. ;

Kasinathan, Deepa ;

Rosner, H. ;

Geibel, C. ;

Gegenwart, P. .

PHYSICAL REVIEW B, 2008, 78 (09)

[8] Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K [J].

Kamihara, Yoichi ;

Watanabe, Takumi ;

Hirano, Masahiro ;

Hosono, Hideo .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (11) :3296-+

[9] Magnetic and structural transitions in layered iron arsenide systems:: AFe2As2 versus RFeAsO [J].

Krellner, C. ;

Caroca-Canales, N. ;

Jesche, A. ;

Rosner, H. ;

Ormeci, A. ;

Geibel, C. .

PHYSICAL REVIEW B, 2008, 78 (10)

[10]

KUMAR M, 2008, ARXIV08074283

← 1 2 3 →