Local spin moment distribution in antiferromagnetic molecular rings probed by NMR
Local spin moment distribution in antiferromagnetic molecular rings probed by NMR
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DOI：
10.1103/physrevlett.97.267204
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发表时间：
2006-12-31
影响因子：
8.6
通讯作者：
Winpenny, R. E. P.
中科院分区：
文献类型：
--
作者：
Micotti, E.;Furukawa, Y.;Winpenny, R. E. P.
在低温下，在 S=3/2 基态的异金属取代反铁磁 (AF) 环 Cr7Cd 中获得了 F-19 和 Cr-53 的 NMR 谱，并与 S=0 基态的同金属 Cr8 AF 环中的谱进行了比较。从光谱分析中，我们可以直接导出异金属环 Cr7Cd 中局部矩的交错非均匀分布的模型独立值。发现实验值与基于包括晶体场效应的有效自旋哈密顿量计算的理论值非常一致。
The NMR spectra of F-19 and Cr-53 have been obtained at low temperatures in a heterometallic substituted antiferromagnetic (AF) ring Cr7Cd with an S=3/2 ground state and compared with the spectra in a homometallic Cr8 AF ring with an S=0 ground state. From the analysis of the spectra one can derive directly model independent values of the staggered nonuniform distribution of the local moment in the heterometallic ring Cr7Cd. The experimental values are found to be in excellent agreement with the theoretical values calculated on the basis of an effective spin Hamiltonian which includes crystal field effects.