1/8 Anomaly in the excess-oxygen-doped La1.8Nd 0.2Cu1-yZnyO4+δ

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

Research output: Contribution to journalArticlepeer-review


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-yZn yO4+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
Article number024524
Pages (from-to)245241-245248
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
Publication statusPublished - 2003 Jul 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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