Reduction of Ordered Moment and Néel Temperature of Quasi-One-Dimensional AntiferromagnetsSr2CuO3andCa2CuO3

1997/01/14 by Kenji Kojima, K. M. Kojima, Y. Fudamoto +15 · 6 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.str-el

paper · pdf · doi:10.1103/physrevlett.78.1787

published as PRL 78, 1787, (1997) · 4 pages, 4 figures

arxiv created 1997/01/14 · openalex publication_date 1997/03/03 · arxiv updated 2009/11/30 · openalex created_date 2020/05/13 · openalex updated_date 2026/07/28

Abstract

We report elastic neutron diffraction and muon spin relaxation ( \ensuremathμSR) measurements of the quasi-one-dimensional antiferromagnets Sr₂CuO₃ and Ca₂CuO₃, which have extraordinarily reduced T_N/J ratios. We observe almost resolution-limited antiferromagnetic Bragg reflections in Sr₂CuO₃ and obtain a reduced ordered moment size of \ensuremath∼0.06\ensuremathμ_B. We find that the ratio of ordered moment size \ensuremathμ(Ca₂CuO₃)/\ensuremathμ(Sr₂CuO₃)\phantom\rule0ex0ex=\phantom\rule0ex0ex1.5(1) roughly scales with their N'eel temperatures, which suggests that the ordered moment size of quasi-one-dimensional antiferromagnets decreases continuously in the limit of vanishing interchain interactions.

Citations

• Continuum dynamics of the 1-D Heisenberg antiferromagnet: Identification with the O(3) nonlinear sigma model

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