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Double Double to Double Perovskite Transformations in Quaternary Manganese Oxides
Angewandte Chemie International Edition ( IF 16.6 ) Pub Date : 2021-08-09 , DOI: 10.1002/anie.202108586
Kunlang Ji 1 , Khalid N Alharbi 1 , Elena Solana-Madruga 1, 2 , Gessica T Moyo 1 , Clemens Ritter 3 , J Paul Attfield 1
Affiliation  

Control of cation ordering in ABX3 perovskites is important to structural, physical and chemical properties. Here we show that thermal transformations of AA′BB′O6 double double perovskites, where both A and B sites have 1:1 cation order, to (A0.5A′0.5)2BB′O6 double perovskites with fully disordered A/A′ cations can be achieved under pressure in CaMnMnWO6 and SmMnMnTaO6, enabling both polymorphs of each material to be recovered. This leads to a dramatic switch of magnetic properties from ferrimagnetic order in double double perovskite CaMnMnWO6 to spin glass behaviour in the highly frustrated double perovskite polymorph. Comparison of double double and double perovskite polymorphs of other materials will enable effects of cation order and disorder on other properties such as ferroelectricity and conductivity to be explored.

中文翻译:

四元锰氧化物中的双双到双钙钛矿转变

ABX 3钙钛矿中阳离子排序的控制对结构、物理和化学性质很重要。在这里,我们展示了 AA'BB'O 6双双钙钛矿的热转变,其中 A 和 B 位点都具有 1:1 的阳离子顺序,到 (A 0.5 A' 0.5 ) 2 BB'O 6双钙钛矿具有完全无序的 A/ A' 阳离子可以在压力下在 CaMnMnWO 6和 SmMnMnTaO 6 中获得,从而能够回收每种材料的两种多晶型物。这导致双双钙钛矿 CaMnMnWO 6中磁性从亚铁磁性顺序发生戏剧性转变在高度受挫的双钙钛矿多晶型物中旋转玻璃行为。比较其他材料的双双和双钙钛矿多晶型物将能够探索阳离子有序和无序对铁电性和导电性等其他性质的影响。
更新日期:2021-09-27
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