Reduction of Ordered Moment and N{acute e}el Temperature of Quasi-One-Dimensional Antiferromagnets Sr{sub 2}CuO{sub 3} and Ca{sub 2}CuO{sub 3}
- Department of Physics, Columbia University, New York, New York 10027 (United States)
- Department of Applied Physics, University of Tokyo, Tokyo 113 (Japan)
- Department of Physics, Tohoku University, Sendai 980-77 (Japan)
- Institute of Inorganic Synthesis, Yamanashi University, Kofu 400 (Japan)
- Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)
We report elastic neutron diffraction and muon spin relaxation ({mu}SR) measurements of the quasi-one-dimensional antiferromagnets Sr{sub 2}CuO{sub 3} and Ca{sub 2}CuO{sub 3}, which have extraordinarily reduced T{sub N}/J ratios. We observe almost resolution-limited antiferromagnetic Bragg reflections in Sr{sub 2}CuO{sub 3} and obtain a reduced ordered moment size of {approximately}0.06{mu}{sub B}. We find that the ratio of ordered moment size {mu}(Ca{sub 2}CuO{sub 3})/{mu}(Sr{sub 2}CuO{sub 3})=1.5(1) roughly scales with their N{acute e}el temperatures, which suggests that the ordered moment size of quasi-one-dimensional antiferromagnets decreases continuously in the limit of vanishing interchain interactions. {copyright} {ital 1997} {ital The American Physical Society}
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 467460
- Journal Information:
- Physical Review Letters, Vol. 78, Issue 9; Other Information: PBD: Mar 1997
- Country of Publication:
- United States
- Language:
- English
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