Structure and magnetic properties of W-type hexaferrites.

ABSTRACT: W-type hexaferrites (WHFs) (SrMe ₂Fe₁₆O₂₇, Me = Mg, Co, Ni and Zn) are hard magnetic materials with high potential for permanent magnet applications owing to their large crystalline anisotropy and high cation tunability. However, little is known with regards to their complex structural and magnetic characteristics. Here, the substitution of metals (Me = Mg, Co, Ni and Zn) in WHFs is described and their crystal and magnetic structures investigated. From joined refinements of X-ray and neutron powder diffraction data, the atomic positions of the Me atoms were extracted along with the magnetic dipolar moment of the individual sites. The four types of WHFs exhibit ferrimagnetic ordering. For Mg, Ni and Zn the magnetic moments are fou

SUBMITTER: Morch MI 

PROVIDER: S-EPMC6503931 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature