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Finite Size Effects in Antiferromagnetic NiO Nanoparticles
Abstract
Antiferromagnetic NiO nanoparticles exhibit anomalous magnetic properties, such as large moments, and coercivities and loop shifts of up to 10 kOe. This behavior is difficult to understand in terms of 2-sublattice antiferromagnetic ordering which is accepted for bulk NiO. Numerical modeling of spin configurations in these nanoparticles yields 8-, 6-, or 4-sublattice configurations, indicating a new finite size effect, in which the reduced coordination of surface spins causes a fundamental change in the magnetic order throughout the particle. The relatively weak coupling between the sublattices allows a variety of reversal paths for the spins upon cycling the applied field, resulting in large coercivities and loop shifts.
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Cited by
Exchange bias in nanostructures
Nogués, J., Sort, J., Langlais, V., Skumryev, V., Suriñach, S., Muñoz, J. S., & Baró, M. D. (2005) · Physics Reports · doi:10.1016/j.physrep.2005.08.004 · Cited by 1,925
Lee, Y., Lee, J., Bae, C. J., Park, J. ‐., Noh, H. ‐., Park, J. ‐., & Hyeon, T. (2005) · Advanced Functional Materials · doi:10.1002/adfm.200400187 · Cited by 419
Metadata
- Authors
- Kodama, R. H., Makhlouf, S. A., & Berkowitz, A. E.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 1997-08-18
- Volume
- 79
- Issue
- 7
- Pages
- 1393-1396
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2070618301
- Cited by
- 866
- References
- 0
- FWCI
- 11.11
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Finite Size Effects in Antiferromagnetic NiO Nanoparticles. https://app.cochat.ai/papers/10.1103/physrevlett.79.1393
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- Kodama, R. H., Makhlouf, S. A., & Berkowitz, A. E. (1997). Finite Size Effects in Antiferromagnetic NiO Nanoparticles. Physical Review Letters. https://doi.org/10.1103/physrevlett.79.1393
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