1/8 anomaly in the excess-oxygen-doped La1.8Nd0.2Cu1−yZnyO4+δ

H. Mikuni, T. Adachi, S. Yairi, Masatsune Kato, Yoji Koike, I. Watanabe, K. Nagamine

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6 Citations (Scopus)

Abstract

We have found the 1/8 anomaly, namely, the anomalous suppression of superconductivity at p (the hole concentration per Cu) =1/8 in the excess-oxygen-doped La1.8Nd0.2Cu1−yZnyO4+δ, where the excess oxygen is doped by the electrochemical technique and the phase separation of the excess oxygen is suppressed. The 1/8 anomaly has become marked by the 1% substitution of Zn for Cu. The muon-spin-relaxation measurements have revealed that the magnetic correlation develops at low temperatures below about 50 K in both Zn-free and 1% Zn-substituted samples with p=1/8. Clear precession of muon spins suggesting the formation of a long-range magnetic order has been observed below 1 K in the 1% Zn-substituted sample with p=1/8. These results are consistent with the stripe-pinning model.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number2
DOIs
Publication statusPublished - 2003 Jan 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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