Growth, annealing effects on superconducting and magnetic properties, and anisotropy of FeSe1-xTex (0.5 ≤ × ≤ 1) single crystals

Takashi Noji, Takumi Suzuki, Haruki Abe, Tadashi Adachi, Masatsune Kato, Yoji Koike

Research output: Contribution to journalArticlepeer-review

94 Citations (Scopus)

Abstract

Single crystals of FeSe1-xTex (0.5 ≤ × ≤ 1) have been grown by the Bridgman method. After annealing them at 400 °C for 100h in vacuum, single crystals of × = 0.5-0.9 have exhibited bulk superconductivity. Anisotropic properties of the electrical resistivity and upper critical field, Hc2, have been investigated for the single-crystal FeSe1-xTex with × = 0.6. It has been found that the in-plane resistivity, ρab, shows a metallic temperature-dependence, while the out-of-plane resistivity, ρc, shows a broad maximum around 100 K. The resistivity ratio, ρc/ ρab, is 44 and 70 at 290 K and just above the superconducting transition temperature, Tc, respectively. The anisotropic parameter, γ = Hc2/Hc2 (superscripts ∥ and indicate field directions parallel and perpendicular to the ab-plane, respectively.), is estimated as 2.7 just below Tc.

Original languageEnglish
Article number084711
Journaljournal of the physical society of japan
Volume79
Issue number8
DOIs
Publication statusPublished - 2010 Aug

Keywords

  • Anisotropy
  • Annealing effect
  • Electrical resistivity
  • FeSeTe single crystal
  • Upper critical field

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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