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Cited by 199

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Characterization of Superparamagnetic “Core−Shell” Nanoparticles and Monitoring Their Anisotropic Phase Transition to Ferromagnetic “Solid Solution” Nanoalloys

Park, Jong-Il, Kim, Min Gyu, Jun, Young-wook, Lee, Jae Sung, Lee, Woo-ram, Cheon, Jinwoo·2004·Journal of the American Chemical Society
DOI 10.1021/ja049649k
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Abstract

The structure, magnetism, and phase transition of core-shell type CoPt nanoparticles en route to solid solution alloy nanostructures are systematically investigated. The characterization of Co(core)Pt(shell) nanoparticles obtained by a "redox transmetalation" process by transmission electron microscopy (TEM) and, in particular, X-ray absorption spectroscopy (XAS) provides clear evidence for the existence of a core-shell type bimetallic interfacial structure. Nanoscale phase transitions of the Co(core)Pt(shell) structures toward c-axis compressed face-centered tetragonal (fct) solid solution alloy CoPt nanoparticles are monitored at various stages of a thermally induced annealing process and the obtained fct nanoalloys show a large enhancement of their magnetic properties with ferromagnetism. The relationship between the nanostructures and their magnetic properties is in part elucidated through the use of XAS as a critical analytical tool.

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Metadata

Authors
Park, J.-I., Kim, M. G., Jun, Y.-W., Lee, J. S., Lee, W.-R., & Cheon, J.
Venue
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Published
2004-07-01
Volume
126
Issue
29
Pages
9072-9078
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
DOI
10.1021/ja049649k
OpenAlex
W1973473963
Cited by
199
References
1
FWCI
5.00
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Characterization of Superparamagnetic “Core−Shell” Nanoparticles and Monitoring Their Anisotropic Phase Transition to Ferromagnetic “Solid Solution” Nanoalloys. https://app.cochat.ai/papers/10.1021/ja049649k
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Park, J.-I., Kim, M. G., Jun, Y.-W., Lee, J. S., Lee, W.-R., & Cheon, J. (2004). Characterization of Superparamagnetic “Core−Shell” Nanoparticles and Monitoring Their Anisotropic Phase Transition to Ferromagnetic “Solid Solution” Nanoalloys. Journal of the American Chemical Society. https://doi.org/10.1021/ja049649k

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