Muon spin relaxation study of the anomalous magnetic behavior in excess-oxygen-doped La1.8 Nd0.2 Cu O4+δ (0.020≤δ≤0.101)

I. Watanabe, N. Oki, T. Adachi, H. Mikuni, Y. Koike, F. L. Pratt, K. Nagamine

研究成果: Article査読

7 被引用数 (Scopus)

抄録

Zero-field muon-spin-relaxation measurements have revealed the hole-concentration dependence of a static magnetically ordered state of Cu spins in excess-oxygen-doped La1.8 Nd0.2 Cu O4+δ with δ ranging from δ=0.020 to 0.101. Muon-spin precession is observed at 1.7 K for δ≤0.0625, consistent with the appearance of a long-range-ordered state of Cu spins. The volume fraction of the long-range-ordered state decreases rapidly with increasing δ, and a static magnetically disordered state of Cu spins becomes dominant for δ>0.030. The magnetic correlations between Cu spins are anomalously enhanced for δ=0.055 and near the hole concentration is 1 8 per Cu, and the superconductivity is simultaneously suppressed. The present results confirm that the so-called 1 8 anomaly is present in the excess-oxygen-doped system in addition to substitutionally doped systems.

本文言語English
論文番号134506
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
73
13
DOI
出版ステータスPublished - 2006

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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