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Field cooled and zero field cooled 207{sup left}Pb NMR of the relaxor ferroelectric PMN

机译:弛豫铁电PMN的场冷和零场冷207 {Pb NMR}

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摘要

A 2.8 kV/cm electric field has been applied parallel to the external magnetic field along the [111] direction of a PMN single crystal and the 207{sup left}Pb NMR spectra were measured at 9.1 T. Whereas the zero field cooled (ZFC) spectrum exhibits a Gaussian-like line shape, the FC spectrum clearly shows a two peak structure. One of the two peaks coincides with the ZFC spectrum. The other peak is shifted by about 100 kHz towards lower frequencies with respect to the ZFC peak and seems to be characteristic for the ferroelectric state. The ferroelectric shift agrees with the predictions of the spherical random bond-random field model.
机译:已沿PMN单晶的[111]方向平行于外部磁场施加了2.8 kV / cm的电场,并且在9.1 T下测量了207 {sup left} Pb NMR光谱。而零场冷却(ZFC )光谱表现出高斯型线状,FC光谱清楚地显示出两个峰结构。这两个峰之一与ZFC频谱重合。另一个峰值相对于ZFC峰值朝着较低的频率移动了约100 kHz,似乎是铁电态的特征。铁电位移与球形随机键-随机场模型的预测一致。

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