Study of Iron-Based Superconductor by Means of X-ray, Neutron, Muon Beams

DOI Web Site 14 References Open Access
  • YAMAURA Jun-ichi
    Materials Research Center for Element Strategy, Tokyo Institute of Technology
  • MATSUISHI Satoru
    Materials Research Center for Element Strategy, Tokyo Institute of Technology
  • IIMURA Soshi
    Materials and Structures Laboratory, Tokyo Institute of Technology
  • HOSONO Hideo
    Materials and Structures Laboratory, Tokyo Institute of Technology
  • HIRAISHI Masatoshi
    Condensed Matter Research Center, Institute of Materials Structure Science, KEK
  • KOJIMA Kenji
    Condensed Matter Research Center, Institute of Materials Structure Science, KEK
  • HIRAKA Haruhiro
    Condensed Matter Research Center, Institute of Materials Structure Science, KEK
  • KADONO Ryousuke
    Condensed Matter Research Center, Institute of Materials Structure Science, KEK
  • MURAKAMI Youichi
    Condensed Matter Research Center, Institute of Materials Structure Science, KEK

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Other Title
  • X線，中性子，ミュオンを用いた鉄系超伝導体の研究
  • Xセン,チュウセイシ,ミュオン オ モチイタ テツケイ チョウデンドウタイ ノ ケンキュウ

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Description

An advanced hydride-ion substitution method on LaFeAsO uncovered the second superconducting (SC) phase with a higher Tc of 36 K (x～0.35) in addition to the first SC phase with the maximum Tc of 26 K (x～0.1). To investigate the origin of the two SC domes and whether a certain hidden phase exists beyond the second SC phase, we have performed a multi-probe study in the range 0.40 ≤ x ≤ 0.51 using X-ray, neutron and muon beams. We discover an antiferromagnetic phase and a unique structural transition in heavily electron-doped LaFeAsO1−xHx (x～0.5), which is regarded as a second parent phase.

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