1 Ocak 2015 Dergi makalesi Açık Erişim

Guler, Nilay Kantarci; Ozcelik, Bekir; Ekicibil, Ahmet; Onar, Kubra; Yakinci, M. Eyyuphan; Okazaki, H.; Takeya, H.; Takano, Y.

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        "affiliation": "Cukurova Univ, Fac Sci & Letters, Dept Phys, Adana, Turkey", 
        "name": "Guler, Nilay Kantarci"
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      {
        "affiliation": "Cukurova Univ, Fac Sci & Letters, Dept Phys, Adana, Turkey", 
        "name": "Ozcelik, Bekir"
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      {
        "affiliation": "Cukurova Univ, Fac Sci & Letters, Dept Phys, Adana, Turkey", 
        "name": "Ekicibil, Ahmet"
      }, 
      {
        "affiliation": "Inonu Univ, Dept Phys, Fac Sci & Arts, Malatya, Turkey", 
        "name": "Onar, Kubra"
      }, 
      {
        "affiliation": "Inonu Univ, Dept Phys, Fac Sci & Arts, Malatya, Turkey", 
        "name": "Yakinci, M. Eyyuphan"
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      {
        "affiliation": "Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan", 
        "name": "Okazaki, H."
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      {
        "affiliation": "Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan", 
        "name": "Takeya, H."
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        "affiliation": "Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan", 
        "name": "Takano, Y."
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    "description": "We have synthesized the superconducting KxFe2-ySe2 (x = 0.8) crystal by using the one step technique. SEM images demonstrate terrace-like structures on the surface and the sample contains two phases. XRD pattern gives the (00l) peaks. The main peaks are indexed to the I4/m space group and the lattice parameter c is calculated to be 13.94076 angstrom. ZFC magnetization measurement exhibits a very sharp transition which indicates the presence of superconductivity in the crystal. The superconducting transition temperature, T-c(mag), obtained from magnetization measurement is estimated to be 31 K. The critical current value, Jc(0), deduced from the M-H loops for sample is approximately 9 x 10(4) A/cm(2) at 5 K. From magnetoresistivity measurement the T-c, T-c(onset) and T-c(offset) temperatures at the absence of the external magnetic field are found as 32.2, 33.1 K and 31.5 K, respectively. The calculated flux pinning or activation energy U is around 0.46 eV for 0 T. (C) 2015 Elsevier B.V. All rights reserved.", 
    "doi": "10.1016/j.matchemphys.2015.08.037", 
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    "journal": {
      "pages": "157-162", 
      "title": "MATERIALS CHEMISTRY AND PHYSICS", 
      "volume": "164"
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    "title": "Structure and physical properties of iron-selenide KxFe2-ySe2"
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