调节A位半径和尺寸无序以调控成分复杂钙钛矿氧化物中的磁有序
Varying A-site radius and size disorder to tune magnetic ordering in compositionally complex perovskite oxides
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中文总结 AI 辅助
本研究通过成分工程调控钙钛矿氧化物A位半径和尺寸无序，合成了含十二种阳离子的单相固溶体，并发现其在89-115 K间呈亚铁磁有序，磁性质受尺寸无序、A位半径和价电子共同影响。
中文摘要 AI 辅助
磁化学家的一个长期目标是能够通过成分工程来控制有序温度。在此，我们报道了一种钙钛矿氧化物的合成，该氧化物在单相固溶体AM7O$_3$中容纳了十二种阳离子，其中A = La$_{\ rac{1}{5}}$Sm$_{\ rac{1}{5}}$Gd$_{\ rac{1}{5}}$Nd$_{\ rac{1}{5}}$Dy$_{\ rac{1}{5}}$ (A5)，M7 = Ti$_{\ rac{1}{7}}$Cr$_{\ rac{1}{7}}$Mn$_{\ rac{1}{7}}$Fe$_{\ rac{1}{7}}$Co$_{\ rac{1}{7}}$Ni$_{\ rac{1}{7}}$Cu$_{\ rac{1}{7}}$。对A5M7O$_3$以及A = La、Gd和La$_{\ rac{1}{2}}$Gd$_{\ rac{1}{2}}$的块体磁测量表明，所有这些化合物在89至115 K之间以亚铁磁体形式磁有序。我们发现，考虑尺寸无序参数与A位阳离子半径和价电子的组合会影响磁性质。
英文摘要
A long standing goal of magnetochemists is to be able to control ordering temperatures through compositional engineering. Here we report the synthesis of a perovskite oxide with twelve cations accommodated within a single phase solid solution, AM7O$_3$, A = La$_{\frac{1}{5}}$Sm$_{\frac{1}{5}}$Gd$_{\frac{1}{5}}$Nd$_{\frac{1}{5}}$Dy$_{\frac{1}{5}}$ (A5), and M7 = Ti$_{\frac{1}{7}}$Cr$_{\frac{1}{7}}$Mn$_{\frac{1}{7}}$Fe$_{\frac{1}{7}}$Co$_{\frac{1}{7}}$Ni$_{\frac{1}{7}}$Cu$_{\frac{1}{7}}$. Bulk magnetometry measurements for A5M7O$_3$, as well as for A = La, Gd and La$_{\frac{1}{2}}$Gd$_{\frac{1}{2}}$, show that all these compounds magnetically order as ferrimagnets between 89 and 115 K. We find that the magnetic properties are influenced by considering a combination of the size disorder parameter alongside the A-site cationic radii and valence electrons.
发表机构
- Uppsala University（乌普萨拉大学）
- Stockholm University（斯德哥尔摩大学）
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