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25 April 2024

» arxiv » cond-mat/9701091

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Reduction of ordered moment and Neel temperature of quasi one-dimensional antiferromagnets Sr2CuO3 and Ca2CuO3
K. M. Kojima ; Y. Fudamoto ; M. Larkin ; G. M. Luke ; J. Merrin ; B. Nachumi ; Y. J. Uemura ; N. Motoyama ; H. Eisaki ; S. Uchida ; K. Yamada ; Y. Endoh ; S. Hosoya ; B. J. Sternlieb ; G. Shirane ;
Date:	14 Dec 1996
Journal:	PRL 78, 1787, (1997)
Subject:	Strongly Correlated Electrons \| cond-mat.str-el
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.
Source:	arXiv, cond-mat/9701091
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