New perovskite CeBaMn2O6: A potential target system to achieve magnetoelectric coupling

We have synthesised the new perovskite CeBaMn2O6, which based in our enumeration of possible magnetoelectric coupling in perovskites is a potential target system to exhibit multiferroic properties. The data from WISH will allow us to refine the magnetic structure and assign a magnetic space group. This will reveal if there is any induced polarisation by the magnetic ordering (through considering the magnetic symmetry). Additionally, patterns collected above the magnetic ordering temperature will allow us to precisely refine the atomic displacement associated with Ce/Ba cation ordering, any octahedral rotations and orbital ordering that is expected to couple to the magnetic structure. The results will lead a broader understanding of the interplay between chemical and magnetic and orbital ordering degrees of freedom and how they may be coupled to produce novel magnetoelectric couplings.

我们合成了新型钙钛矿CeBaMn2O6。基于我们对钙钛矿中潜在磁电耦合(magnetoelectric coupling)的系统枚举，该材料是展现多铁性(multiferroic properties)的潜在目标体系。WISH的实验数据将助力我们精修磁结构(magnetic structure)并确定磁空间群(magnetic space group)，由此可通过磁对称性分析，揭示磁有序(magnetic ordering)是否会诱导产生极化。此外，在磁有序温度(magnetic ordering temperature)以上采集的衍射图样，将使我们能够精确精修与Ce/Ba阳离子有序(cation ordering)相关的原子位移(atomic displacement)，以及预期与磁结构耦合的八面体旋转(octahedral rotations)和轨道有序(orbital ordering)。本研究结果将推动我们更全面地理解化学有序、磁有序与轨道有序自由度(degrees of freedom)之间的相互作用，以及这些有序形式如何相互耦合以产生新型磁电耦合效应。