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Antiphase boundaries in truncated octahedron-shaped Zn-doped magnetite nanocrystals

Posted in

Publication Type:

Journal Article

Authors:

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

Source:

Journal of Materials Chemistry C, Volume 6, Issue 47, p.12800 - 12807 (2018)

DOI:

10.1039/C8TC05731A

Keywords:

STEM-group

Abstract:

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.

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