Magnetic excitations in the spin-glass phase of La2-xSrxCuO4

Hideto Goka, Shin Ichi Kuroshima, Masaki Fujita, Kazuyoshi Yamada, Haruhiro Hiraka, Yasuo Endoh, Christopher D. Frost

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

Magnetic excitations of La1.95Sr0.05CuO4 were investigated using pulsed neutron inelastic scattering over a wide range of energy up to 300 meV. In contrast to the optimally doped superconductor the dynamical magnetic susceptibility χ(ω) around (π,π) in the spin-glass phase monotonically decreases with increasing ω and nearly saturates beyond ∼50 meV. We found that the energy dependence of the q-position in the latter energy region is ascribed to a two-dimensional spin-wave dispersion relation with the nearest neighbor interaction J of 108 ± 6 meV, which is smaller by ∼20% than that of La2CuO4.

Original languageEnglish
Pages (from-to)239-240
Number of pages2
JournalPhysica C: Superconductivity and its applications
Volume388-389
DOIs
Publication statusPublished - 2003 May
Externally publishedYes
Eventproceedings of the 23rd international conference on low temper - Hiroshima, Japan
Duration: 2002 Aug 202002 Aug 27

Keywords

  • LaSrCuO
  • Neutron scattering
  • Spin excitation

ASJC Scopus subject areas

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

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