Pressure effects on spin-gap and antiferromagnetism in the hole-doped spin ladder system Sr2.5Ca11.5Cu24O41

S. Katano, T. Nagata, H. Fujino, J. Akimitsu, M. Nishi, K. Kakurai

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8 Citations (Scopus)


The spin singlet state and the hole-induced antiferromagnetism of the spin ladder system Sr2.5Ca11.5Cu24O41, which shows superconductivity under high pressure, have been studied by neutron scattering under the pressures up to 3.0 GPa. The results for the spin gap excitations indicate that the intensity decreases progressively with increasing pressure; however, they suggest that the spin gap energy is almost the same as that at ambient pressure, ∼32 meV. The intensity for the antiferromagnetic order, and the magnetic moment, decreases with increasing pressure, and seems to disappear at the critical pressure for the superconductivity. On the other hand, the Néel temperature TN (about 2 K at ambient pressure) increases slightly.

Original languageEnglish
Pages (from-to)1046-1047
Number of pages2
JournalPhysica B: Condensed Matter
Publication statusPublished - 1999
Externally publishedYes


  • Antiferromagnetism
  • High pressure
  • Neutron scattering
  • Spin gap
  • Spin ladder
  • SrCaCuO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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