Growth and superconducting properties of F-substituted ROBiS2 (R=La, Ce, Nd) single crystals

Masanori Nagao, Akira Miura, Satoshi Demura, Keita Deguchi, Satoshi Watauchi, Takahiro Takei, Yoshihiko Takano, Nobuhiro Kumada, Isao Tanaka

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)

Abstract

F-substituted ROBiS2 (R=La, Ce, Nd) superconducting single crystals with different F concentrations were grown successfully using a CsCl/KCl flux. All crystals produced had a plate-like shape, with a well-developed ab-plane 1-2 mm in size. Electron probe microanalysis did not detect any Cs, K, or Cl flux components in the crystals. As-grown single crystals of F-substituted LaOBiS2 and CeOBiS2 exhibited superconductivity at about 3 K, whereas F-substituted NdOBiS2 was superconductive at approximately 5 K. The superconducting anisotropy of single crystal F-substituted LaOBiS2 and NdOBiS2 was estimated to be 30-45 according to the effective mass model, whereas the anisotropy for F-substituted CeOBiS2 single crystals was 13-21. The F-substituted CeOBiS2 single crystals exhibited a magnetic order around 7 K that apparently coexisted with superconductivity below approximately 3 K.

Original languageEnglish
Pages (from-to)33-36
Number of pages4
JournalSolid State Communications
Volume178
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • B. Flux growth
  • D. Superconducting anisotropy

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