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 (s) 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.
Revised: August 27, 2013 |
Published: June 26, 2013
Citation
Kaur M., Q. Dai, M.E. Bowden, M.H. Engelhard, Y. Wu, J. Tang, and Y. Qiang. 2013.Watermelon-like iron nanoparticles: Cr doping effect on magnetism and magnetization interaction reversal.Nanoscale 5, no. 17:7872-7881.PNNL-SA-91331.doi:10.1039/C3NR02247A