Anisotropic magnetic and superconducting properties of CaFe2-xCoxAs2 (x=0, 0.06) single crystals

被引：84
作者：
Kumar, Neeraj [1 ]
Nagalakshmi, R. [1 ]
Kulkarni, R. [1 ]
Paulose, P. L. [1 ]
Nigam, A. K. [1 ]
Dhar, S. K. [1 ]
Thamizhavel, A. [1 ]
机构：
[1] Tata Inst Fundamental Res, Dept Condensed Matter Phys & Mat Sci, Mumbai 400005, Maharashtra, India
来源：
PHYSICAL REVIEW B | 2009年 / 79卷 / 01期
关键词：
arsenic alloys; calcium alloys; cobalt alloys; electrical resistivity; iron alloys; magnetic anisotropy; magnetic susceptibility; Mossbauer effect; paramagnetic materials; solid-state phase transformations; specific heat; spin density waves; superconducting transitions; 43; K; FIELD;
D O I：
10.1103/PhysRevB.79.012504
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report on anisotropic dc magnetic susceptibility chi(T), electrical resistivity rho(T), and heat-capacity C(T) measurements on the single crystals of CaFe2-xCoxAs2 for x=0 and 0.06. Large-sized single crystals were grown by the high-temperature solution method with Sn as the solvent. The spin-density wave (SDW)/structural transition observed at 170 K in the pure CaFe2As2 compound is suppressed for the Co-doped sample CaFe1.94Co0.06As2 and superconductivity is observed at similar or equal to 17 K. The superconducting transition has been confirmed from the magnetization and electrical resistivity studies. The Fe-57 Mossbauer spectrum in CaFe2As2 indicates that the SDW ordering is incommensurate with the crystal lattice. In the Co-doped sample, a prominent paramagnetic line at 4.2 K is observed indicating a weakening of the SDW state.
引用
收藏
页数：4
相关论文
共 20 条
  • [1] Microscopic 75As NMR study of the effect of impurities on the first-order spin-density-wave transition in BaFe2As2
    Baek, S. -H.
    Klimczuk, T.
    Ronning, F.
    Bauer, E. D.
    Thompson, J. D.
    Curro, N. J.
    [J]. PHYSICAL REVIEW B, 2008, 78 (21):
  • [2] Incommensurate modulated magnetic structure in orthorhombic EuPdSb
    Bonville, P
    Hodges, JA
    Shirakawa, M
    Kasaya, M
    Schmitt, D
    [J]. EUROPEAN PHYSICAL JOURNAL B, 2001, 21 (03) : 349 - 355
  • [3] Superconductivity at 43 K in SmFeAsO1-xFx
    Chen, X. H.
    Wu, T.
    Wu, G.
    Liu, R. H.
    Chen, H.
    Fang, D. F.
    [J]. NATURE, 2008, 453 (7196) : 761 - 762
  • [4] Lattice and magnetic instabilities in CaFe2As2:: A single-crystal neutron diffraction study
    Goldman, A. I.
    Argyriou, D. N.
    Ouladdiaf, B.
    Chatterji, T.
    Kreyssig, A.
    Nandi, S.
    Ni, N.
    Bud'ko, S. L.
    Canfield, P. C.
    McQueeney, R. J.
    [J]. PHYSICAL REVIEW B, 2008, 78 (10):
  • [5] Iron-based layered superconductor La[O1-xFx]FeAs (x=0.05-0.12) with Tc=26 K
    Kamihara, Yoichi
    Watanabe, Takumi
    Hirano, Masahiro
    Hosono, Hideo
    [J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (11) : 3296 - +
  • [6] Commensurate Itinerant Antiferromagnetism in BaFe2AS2: 75As-NMR Studies on a Self-Flux Grown Single Crystal
    Kitagawa, Kentaro
    Katayama, Naoyuki
    Ohgushi, Kenya
    Yoshida, Makoto
    Takigawa, Masashi
    [J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2008, 77 (11)
  • [7] McKenzie R. H., ARXIVCONDMAT9706235
  • [8] Anisotropic thermodynamic and transport properties of single-crystalline Ba1-xKxFe2As2 (x=0 and 0.45)
    Ni, N.
    Bud'ko, S. L.
    Kreyssig, A.
    Nandi, S.
    Rustan, G. E.
    Goldman, A. I.
    Gupta, S.
    Corbett, J. D.
    Kracher, A.
    Canfield, P. C.
    [J]. PHYSICAL REVIEW B, 2008, 78 (01):
  • [9] First-order structural phase transition in CaFe2As2
    Ni, N.
    Nandi, S.
    Kreyssig, A.
    Goldman, A. I.
    Mun, E. D.
    Bud'ko, S. L.
    Canfield, P. C.
    [J]. PHYSICAL REVIEW B, 2008, 78 (01):
  • [10] Pressure-induced superconductivity in CaFe2As2
    Park, Tuson
    Park, Eunsung
    Lee, Hanoh
    Klimczuk, T.
    Bauer, E. D.
    Ronning, F.
    Thompson, J. D.
    [J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (32)
12