Antiphase boundaries in truncated octahedron-shaped Zn-doped magnetite nanocrystals
Antiphase boundaries in truncated octahedron-shaped Zn-doped magnetite nanocrystals
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DOI：
10.1039/c8tc05731a
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发表时间：
2018-12-21
影响因子：
6.4
通讯作者：
Salgueirino, Veronica
中科院分区：
文献类型：
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作者：
Fontaina-Troitino, Nerio;Ramos-Docampo, Miguel A.;Salgueirino, Veronica
具有局部铁磁耦合的反相边界的存在与截短的八面体形状的锌掺杂的磁铁矿纳米晶体的磁性能有关。原子分辨率STEM成像揭示了这些反相边界垂直于纳米晶体的尖晶石结构的[111]方向的存在。磁性表征和DFT计算表明，局部铁磁秩序，从Fe-Fe富集在这些单独的晶格缺陷中的纳米晶体，作为测量的磁响应的根本原因。
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.