Magnetic and structural degrees of freedom in 5d double perovskites

Materials adopting the perovskite structure are an important research focus because they can accommodate a huge range of elements to give tailored physical properties. Emerging technologies require increasingly unusual functional materials and so understanding the origins of complex magnetic and electronic behaviour, and how these can be tuned is crucial. Our proposal focuses on the perovskite Pb2MgReO6 in which the heavy Re6+ cation has the potential to adopt unusual magnetic states. We hope to use neutron diffraction to understand the magnetic behaviour of Pb2MgReO6 as well as its crystal structure. By investigating these both using the same technique we will also be able to explore how the magnetism and structure influence each other - both in Pb2MgReO6 and in related materials.

具有钙钛矿结构（perovskite structure）的材料是当前重要的研究热点，因其可容纳多种元素，从而实现定制化的物理性能。新兴技术对非常规功能材料的需求日益提升，因此解析复杂磁学与电学行为的起源，以及如何对其进行调控，至关重要。本研究聚焦于钙钛矿材料Pb₂MgReO₆，其中重六价铼（Re⁶⁺）阳离子具备呈现非常规磁态的潜力。我们计划借助中子衍射（neutron diffraction）技术，解析Pb₂MgReO₆的磁学行为与晶体结构。通过同一技术对二者开展研究，我们还能够探究Pb₂MgReO₆及其相关材料中，磁学行为与晶体结构之间的相互影响机制。