London Penetration Depth of Fe-Based Superconductors

Abstract:

Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature. Fe-based superconductors are superconductors whose containing iron compounds and having a very high critical magnetic field. London penetration depth can assist in the study of the behavior of the critical magnetic field. The London penetration depth is the distance to which a magnetic field penetrates into a superconductor and becomes equal to 0.367879 times that of the magnetic field at the surface of the superconductor. In this paper, the London penetration depth of Fe-based superconductors is studied by Ginzburg-Landau scenery. Free energy of Fe-based superconductors is assumed by modified the free energy of two-band magnetic superconductors model and theof Fe-based superconductors is derived analytically. Finally, the temperature dependence of is investigated and applied to Single-Crystal superconductors.

• Periodical: Advanced Materials Research (Volume 979)
• Pages: 297-301
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.979.297
• Online since: June 2014
• Authors: Arpapong Changjan*, Pongkaew Udomsamuthirun
• Keywords: Fe-Based Superconductors, Ginzburg-Landau Theory, London Penetration Depth

References

[1] Y. Kamihara, T. Watanabe, M. Hirano and H. Hosono, Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0. 05−0. 12) with Tc = 26 K, Journal of the American Chemical Society. 130(2008) 3296-3297.

DOI: 10.1021/ja800073m.s002

[2] Ren Zhi-An, Lu Wei, Yang Jie, Yi Wei, Shen Xiao-Li, Zheng-Cai, Che Guang-Can, Dong Xiao-Li, SunLi-Ling, ZhouFang and ZhaoZhong-Xian, Superconductivity at 55 K in Iron-Based F-Doped Layered Quaternary Compound Sm[O1-xFx]FeAs, Chinese Physics Letters. 25(2008).

DOI: 10.1088/0256-307x/25/6/080

[3] X. Zhu, H. Yang, L. Fang, G. Mu and Hai-Hu Wen, Upper critical field, Hall effect and magnetoresistance in the iron-based layered superconductor LaFeAsO0. 9F0. 1−δ, Superconductor Science and Technology. 21(2008) 105001.

DOI: 10.1088/0953-2048/21/10/105001

[4] Igor I. Mazin, Superconductivity gets an iron boost, Nature. 464(2010) 183-186.

DOI: 10.1038/nature08914

[5] D. P. Hampshire, Ferromagnetic and antiferromagnetic superconductivity. Physica C. 304(1998) 1-11.

[6] D. P. Hampshire, The non-hexagonal flux-line lattice in superconductors, Journal of Physics: Condensed Matter. 13(2001) 6095-6113.

DOI: 10.1088/0953-8984/13/27/304

[7] A. Changjan and P. Udomsamuthirun, The critical magnetic field of anisotropic two-band magnetic superconductors, Solid State Communications. 151(14-15) (2011) 988-992.

DOI: 10.1016/j.ssc.2011.04.032

[8] I.N. Askerzade and A. Gencer, London penetration depth (T) in two-band Ginzburg-Landau theory: application to MgB2, Solid State Communications. 123(1) (2002) 63-67.

DOI: 10.1016/s0038-1098(02)00214-4

[9] N. Niyomsilpchai, A. Changjan, and P. Udomsamuthirun, London penetration depth λ(T) in Type 1. 5 superconductor by Ginzburg-Landau approach, Advanced Materials Research. 770(2013) 291-294.

DOI: 10.4028/www.scientific.net/amr.770.291

[10] R. T. Gordon, N. Ni, C. Martin, M. A. Tanatar, M. D. Vannette, H. Kim, G. D. Samolyuk, J. Schmalian, S. Nandi, A. Kreyssig, A. I. Goldman, J. Q. Yan, S. L. Bud'ko, P. C. Canfield and R. Prozorov, Unconventional London Penetration Depth in Single-Crystal Superconductors, Physical Review letter 102 (2009).

DOI: 10.1103/physrevlett.102.127004