Examples include the compositional complexity that drives domain structure in relaxor ferroelectrics (such as PbMg 1/3Nb 2/3O 3 or Sr 0.5Ba 0.5Nb 2O 6) 5, 6 and relaxor ferromagnets (such as LaNi 2/3Sb 1/3O 3) 7 and Jahn-Teller distortions that give rise to specific electronic and magnetic properties as e.g., observed in LaMnO 3 8 or PbTe 9. However, it is known that certain types of correlated disorder can lead to phenomena that are inaccessible to ordered structures 1, 2, 3, 4. Similar content being viewed by othersįunctional materials design uses structure–property relationships which focus on structurally ordered systems, where disorder and defects are generally considered detrimental. In this work, we compare the 3D-ΔPDF from electron diffraction data with those obtained from neutron and x-ray experiments of yttria-stabilized zirconia (Zr 0.82Y 0.18O 1.91) and demonstrate the reliability of the proposed approach. Here, we combine the advantages of three-dimensional electron diffraction – a method that allows single crystal diffraction measurements on sub-micron sized crystals – and three-dimensional difference pair distribution function analysis (3D-ΔPDF) to address this problem. The analysis is notoriously difficult, especially if only powder samples are available. Local order can be probed experimentally by diffuse scattering. To understand disorder-property relationships, the disorder – i.e., the local ordering principles – must be quantified. However, the introduction of disorder into materials provides structural flexibility and thus access to material properties that are not attainable in conventional, ordered materials. Structure-property relationships in ordered materials have long been a core principle in materials design.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |