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首页> 外文期刊>Chemistry: A European journal >AgRuO_3, a Strongly Exchange-Coupled Honeycomb Compound Lacking Long-Range Magnetic Order
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AgRuO_3, a Strongly Exchange-Coupled Honeycomb Compound Lacking Long-Range Magnetic Order

机译：Agruo_3，一种强大的交换耦合蜂窝化合物，缺乏远程磁秩序

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摘要

Quasi two-dimensional (2D) oxide-based honeycomb lattices have attracted great attention for displaying specific electronic instabilities, which give rise to unconventional bonding patterns and unexpected magnetic exchange couplings. The synthesis of AgRuO_3, another representative exhibiting unique structural properties, is reported here. The stacking sequence of the honeycomb layers (Ru_2O_6) differs from analogous precedents; in particular, the intercalating silver atoms are shifted from the middle of the interspaces and cap the void octahedral sites of the (□Ru_2O_6) slabs from both sides. This way, charge neutral, giant 2D "molecules" of Ag/Ru_2O_6/Ag resu a feature that significantly enhances the overall 2D character of AgRuO_3. Measurements of magnetization have revealed extremely strong magnetic exchange coupling to be present, surviving to a temperature as high as 673 K, which is the temperature of thermal decomposition. No indication for long-range magnetic order has, however, been observed. Theoretical analyses confirm the pronounced 2D character of the electronic system, and in particular reveal the inter-honeycomb layer coupling J_c to be distinctly weak.
机译：准二维（2D）基于氧化物的蜂窝状格子引起了展示特定的电子稳定性的极大关注，这引起了非传统的粘接图案和意外的磁交换联轴器。在此报告Agruo_3的合成，其另一个具有独特结构性质的代表性。蜂窝层的堆叠序列（RU_2O_6）不同于类似的先例;特别地，嵌入银原子从间隙的中间移位，并从两侧覆盖（□Ru_2O_6）板的空隙八面体位点。这样，AG / RU_2O_6 / AG的巨型2D“分子”的充电中性，巨型2D“分子”;一个明显增强Agruo_3的总体2D字符的功能。磁化的测量揭示了极强的磁交换偶联，呈现为高达673 k的温度，这是热分解的温度。然而，没有观察到远程磁性顺序的指示。理论分析确认了电子系统的明显的2D特征，特别是揭示了蜂窝间层耦合J_C明显弱。

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