Low-Temperature Spin Diffusion in a Highly Ideal S= Heisenberg Antiferromagnetic Chain Studied by Muon Spin Relaxation
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The organic radical-ion salt DEOCC-TCNQF4 contains linear chains of stacked molecules with significant Heisenberg antiferromagnet interactions along the chain and extremely weak interactions between the chains. Zero-field µSR has confirmed the absence of long-range magnetic order down to 20 mK and field-dependent µSR is found to be consistent with diffusive motion of the spin excitations. The anisotropic spin dynamics and the upper boundary for magnetic ordering temperature both indicate interchain magnetic coupling |J|<7 mK. As the intrachain coupling J is 110 K, |J/J| is significantly less than 10-4. This system therefore provides one of the most ideal examples of the one-dimensional S=1/2 Heisenberg antiferromagnet yet discovered.
収録刊行物
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- Physical Review Letters
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Physical Review Letters 96 (24), 247203-1-247203-4, 2006-06-19
American Physical Society
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詳細情報 詳細情報について
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- CRID
- 1570009752698991744
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- NII論文ID
- 120002440809
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- NII書誌ID
- AA00773679
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- ISSN
- 00319007
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- Web Site
- http://hdl.handle.net/10228/631
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- 本文言語コード
- en
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- データソース種別
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