Reduction of Ordered Moment and Néel Temperature of Quasi-One-Dimensional AntiferromagnetsSr2CuO3andCa2CuO3 Academic Article uri icon

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abstract

  • We report elastic neutron diffraction and muon spin relaxation (muSR) measurements of the quasi one-dimensional antiferromagnets Sr2CuO3 and Ca2CuO3, which have extraordinarily reduced TN/J ratios. We observe almost resolution-limited antiferromagnetic Bragg reflections in Sr2CuO3 and obtain a reduced ordered moment size of ~0.06 \muB. We find that the ratio of ordered moment size \mu(Ca2CuO3)/\mu(Sr2CuO3)=1.5(1) roughly scales with their Neel temperatures, which suggests that the ordered moment size of quasi one-dimensional antiferromagnets decreases continuously in the limit of vanishing inter-chain interactions.

authors

  • Kojima, KM
  • Fudamoto, Y
  • Larkin, M
  • Luke, Graeme
  • Merrin, J
  • Nachumi, B
  • Uemura, YJ
  • Motoyama, N
  • Eisaki, H
  • Uchida, S
  • Yamada, K
  • Endoh, Y
  • Hosoya, S
  • Sternlieb, BJ
  • Shirane, G

publication date

  • March 3, 1997