富~（17）O LaMnO3化学计量晶体的首次~（17）O NMR研究
First 17O NMR study of a 17O enriched LaMnO3 stoichiometric crystal
摘要：
我们提出的合成和NMR表征的17 O富集的LaMnO 3晶体样品。我们检查了它是单相的，更重要的是，在氧气中是化学计量的。用核磁共振谱估计其~（17）O富集度约为5.5%。这些第一个17 O NMR结果在T= 415 K在未掺杂的母体LaMnO 3锰氧化物中得到的证明，两个氧位点的结构探针非常不同的Mn自旋相关的顺磁轨道有序相。这项工作开辟了途径，实验研究负责轨道顺序的相互作用。
英文摘要：
We present the synthesis and the NMR characterization of a 17O enriched LaMnO3 crystalline sample. We checked that it is single phase and, more important, stochiometric in oxygen. Its 17O enrichment estimated by NMR is about 5.5%. These first 17O NMR results obtained at T=415K in a undoped parent LaMnO3 manganite demonstrate that the two oxygen sites of the structure probe very different Mn spin correlations in the paramagnetic orbital ordered phase. This work opens the way to study experimentally the interactions responsible for the orbital order.
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