Strong correlation between field-induced magnetism and superconductivity in Pr 0.89LaCe 0.11CuO 4

Ryosuke Kadono, Kazuki Ohishi, Akihiro Koda, Wataru Higemoto, Kenji M. Kojima, Masaki Fujita, Shin Ichi Kuroshima, Kazuyoshi Yamada

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We report the local magnetic response of an electron-doped cuprate superconductor, Pr 0.89LaCe 0.11-CuO 4-y (T c ≃ 26K), studied by muon spin rotation (μSR) over a field range from 200 Oe to 50 kOe. In the paramagnetic state, the muon Knight shift along the crystal c-axis (K μ z) is proportional to the in-plane susceptibility χ ab. More surprisingly, K μ z is strongly enhanced by the occurrence of superconductivity (below ∼40 kOe), changing its sign from positive to negative around ∼1 kOe with increasing field. This finding can be understood by considering the weak polarization of Pr ions due to the superexchange interaction with the antiferromagnetic Cu sublattice, which coexists with superconductivity.

Original languageEnglish
Pages (from-to)2944-2947
Number of pages4
Journaljournal of the physical society of japan
Volume73
Issue number11
DOIs
Publication statusPublished - 2004 Nov 1

Keywords

  • Electron-doped cuprates
  • Magnetism
  • Superconductivity
  • μSR

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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