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

研究成果: Article査読

11 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)2944-2947
ページ数4
ジャーナルjournal of the physical society of japan
73
11
DOI
出版ステータスPublished - 2004 11月

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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