Cooperative order in the weakly magnetic domain of LaFeAsO1-xFx near the doping phase boundary

Masatoshi Hiraishi, Ryosuke Kadono, Masanori Miyazaki, Ichihiro Yamauchi, Akihiro Koda, Kenji M. Kojima, Motoyuki Ishikado, Shuichi Wakimoto, Shin Ichi Shamoto

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2 Citations (Scopus)

Abstract

Spatial phase separation into mesoscopic domains of non-magnetic [superconducting (SC) below Tc ≃ 25.5 K] and two kinds of magnetic phases, one showing disordered spin density wave (d-SDW) order and another associated with glassy weak magnetism (WM), are observed below ∼100K by muon spin rotation (μSR) in LaFeAsO1-xFx for x = 0.057(3), which is near the boundary of these phases on the doping phase diagram. In contrast to the competing order observed in the regular SDW phase of Ba(Fe1-xCox)2As2, the WM domain exhibits cooperative coupling of superconducting and magnetic order parameters as inferred from strong diamagnetism and the associated negative shift of μSR frequency just below Tc.

Original languageEnglish
Article number103707
JournalJournal of the Physical Society of Japan
Volume83
Issue number10
DOIs
Publication statusPublished - 2014 Oct 15

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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