Structure determination and crystal chemistry of large repeat mixed-layer hexaferrites.

ABSTRACT: Hexaferrites are an important class of magnetic oxides with applications in data storage and electronics. Their crystal structures are highly modular, consisting of Fe- or Ba-rich close-packed blocks that can be stacked in different sequences to form a multitude of unique structures, producing large anisotropic unit cells with lattice parameters typically >100 Å along the stacking axis. This has limited atomic-resolution structure solutions to relatively simple examples such as Ba₂Zn₂Fe₁₂O₂₂, whilst longer stacking sequences have been modelled only in terms of block sequences, with no refinement of individual atomic coordinates or occupancies. This paper describes the growth of a series of complex hexaferrite crystals, their atomic-level structur

SUBMITTER: Delacotte C 

PROVIDER: S-EPMC6211530 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature