1/8 anomaly in the excess-oxygen-doped La2-xAxCuO4+δ (A = Nd, Bi, Pr)

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

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Abstract

We have investigated in detail dependence on p (the hole concentration per Cu) of the transport properties and Tc in the excess-oxygen-doped La2-xAxCuO4+δ (A = Nd, Bi, Pr), where the phase separation of the excess oxygen is suppressed. The so-called 1/8 anomaly has been found in La1.8Nd0.2 CuO4+δ. The 1/8 anomaly has become marked through the 1% substitution of Zn for Cu. The μSR measurements have revealed that the magnetic correlation develops at low temperatures below about 40 K in both Zn-free and 1% Zn-substituted samples with p = 1/8 and that a long-range magnetic order is formed below 1 K in the 1% Zn-substituted sample with p = 1/8. These results support the stripe-pinning model. Neither La2-xBixCuO4+δ nor La2-xPrxCuO4+δ has exhibited the clear 1/8 anomaly.

Original languageEnglish
Pages (from-to)837-841
Number of pages5
JournalJournal of Low Temperature Physics
Volume131
Issue number5-6
DOIs
Publication statusPublished - 2003 Jun

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

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    Koike, Y., Mikuni, H., Watanabe, I., Adachi, T., Yairi, S., & Nagamine, K. (2003). 1/8 anomaly in the excess-oxygen-doped La2-xAxCuO4+δ (A = Nd, Bi, Pr). Journal of Low Temperature Physics, 131(5-6), 837-841. https://doi.org/10.1023/A:1023431127508