通过SiO₂介导的简便水热合成获得螺状Co₂Te₃O₈
SiO$_2$-mediated facile hydrothermal synthesis of spiroffite-type Co$_2$Te$_3$O$_8$
AI总结：
研究通过SiO₂和碱金属碳酸盐作为矿化剂，发现水热条件下可稳定螺状Co₂Te₃O₈并增强低温铁磁性，揭示了矿化剂对复杂磁基态调控的复杂性。
摘要：
新型材料的水热合成通常依赖于对反应溶液中所有阳离子的氧化还原活动的理解以及少量所谓的矿化剂来调节溶液的总体化学势。在使用非传统矿化剂物种SiO₂时，我们展示了在比先前报告更温和的水热条件下，螺状Co₂Te₃O₈的稳定化。当在SiO₂和各自相应的碱金属碳酸盐作为二次矿化剂存在下合成时，宿主结构中的硅取代替位碲变得明显，由此引入的无序导致了增强的低温铁磁性。我们的结果强调了在通过水热合成技术稳定和调节复杂磁基态时，未充分利用和组合矿化剂物种的复杂性。
英文摘要：
The hydrothermal synthesis of novel materials typically relies on both knowledge of the redox activities of all cations present in the reaction solution and a small toolset of so-called mineralizers to tune the solution's overall chemical potential. Upon the use of a less conventional mineralizer species, SiO$_2$, we show the stabilization of spiroffite-type Co$_2$Te$_3$O$_8$ under less forceful hydrothermal conditions than in previous reports. When synthesized in the presence of both SiO$_2$ and each respective alkali carbonate as a secondary mineralizer, silicon substitution in place of tellurium in the host structure becomes apparent, and the corresponding introduced disorder gives rise to enhanced low-temperature ferromagnetism. Our results highlight the complexities of underutilized and combined mineralizer species in the stabilization and tuning of complex magnetic ground states via hydrothermal synthesis techniques.
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