Origin of reduced magnetization and domain formation in small magnetite nanoparticles
- Univ. of York (United Kingdom). Dept. of Physics
- SuperSTEM, Daresbury (United Kingdom)
- Carnegie Mellon Univ., Pittsburgh, PA (United States). Physics Dept.; Univ. of Electronic Science and Technology of China, Chengdu (China). State Key Laboratory of Electronic Thin Films and Integrated Devices
- Carnegie Mellon Univ., Pittsburgh, PA (United States). Physics Dept.
- Univ. of Cadiz, Puerto Real (Spain). Dept. of Computer Science and Engineering
We compare the structural, chemical, and magnetic properties of magnetite nanoparticles. Aberration corrected scanning transmission electron microscopy reveals the prevalence of antiphase boundaries in nanoparticles that have significantly reduced magnetization, relative to the bulk. We show that atomistic magnetic modelling of nanoparticles with and without these defects reveal the origin of the reduced moment. Strong antiferromagnetic interactions across antiphase boundaries support multiple magnetic domains even in particles as small as 12–14 nm.
- Research Organization:
- Carnegie Mellon Univ., Pittsburgh, PA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FG02-08ER46481
- OSTI ID:
- 1366451
- Journal Information:
- Scientific Reports, Vol. 7; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Cited by: 77 works
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