Watermelon-like iron nanoparticles: Cr doping effect on magnetism and magnetization interaction reversal
Journal Article
·
· Nanoscale, 5(17):7872-7881
Chromium (Cr) forms a solid solution with iron (Fe) lattice when doped in core-shell iron -iron oxide nanocluster (NC) and shows a mixed phase of sigma (σ) FeCr and bcc Fe. The Cr dopant affects heavily the magnetization and magnetic reversal process, and causes the hysteresis loop to shrink near the zero field axis. Dramatic transformation happens from dipolar interaction (0 at. % Cr) to strong exchange interaction (8 at. % of Cr) is confirmed from the Henkel plot and delta M plot, and is explained by a water-melon model of core-shell NC system.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1091456
- Report Number(s):
- PNNL-SA-91331; 44713; KP1704020
- Journal Information:
- Nanoscale, 5(17):7872-7881, Journal Name: Nanoscale, 5(17):7872-7881
- Country of Publication:
- United States
- Language:
- English
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