68. Antiphase Boundaries in Truncated Octahedron-shaped Zn-doped Magnetite Nanocrystals

Nerio Fontaiña-Troitiño, Miguel A. Ramos-Docampo, Martín Testa-Anta, Benito Rodríguez-González, Manuel Bañobre-López, Laura Bocher, Keith P. McKenna, Verónica Salgueiriño

J. Materials Chemistry C (2018) 6, 12800-12807 (DOI: 10.1039/C8TC05731A).

The presence of antiphase boundaries with local ferromagnetic coupling is herein related to the magnetic performance of truncated octahedron-shaped zinc-doped magnetite nanocrystals. Atomic resolution STEM imaging reveals the presence of these antiphase boundaries perpendicular to the [111] direction of the spinel structure of the nanocrystals. Magnetic characterization and DFT calculations indicate a local ferromagnetic order, originating from Fe-Fe enrichment at these individual lattice defects in the nanocrystals, as the underlying cause of the magnetic response measured.

 33 2018 JMaterChemC