Frustration Driven Lattice Distortion: An NMR Investigation of Y2Mo2O7
Frustration Driven Lattice Distortion: An NMR Investigation of Y2Mo2O7
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挫败驱动的晶格畸变：Y2Mo2O7 的 NMR 研究
DOI：
10.1103/physrevlett.87.177201
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发表时间：
2001
影响因子：
8.6
通讯作者：
J. Gardner
中科院分区：
文献类型：
--
作者：
A. Keren;J. Gardner
我们研究了磁挫烧绿石 Y(2)Mo(2)O(7) 中的 (89)Y NMR 谱和自旋晶格弛豫 T(1)。我们发现，冷却后光谱会发生变化，并且不对称地变宽。对低 T 光谱的详细检查表明，它是由多个峰构成的，每个峰的偏移量不同。我们认为该频谱是由于离散晶格畸变造成的，并推测这些畸变缓解了挫败感并降低了系统的能量。
We have investigated the (89)Y NMR spectrum and spin lattice relaxation, T(1), in the magnetically frustrated pyrochlore Y(2)Mo(2)O(7). We find that upon cooling the spectrum shifts, and broadens asymmetrically. A detailed examination of the low T spectrum reveals that it is constructed from multiple peaks, each shifted by a different amount. We argue that this spectrum is due to discrete lattice distortions and speculate that these distortions relieve the frustration and reduce the system's energy.