Correlation Between Saturation Magnetization, Bandgap, and Lattice Volume of Transition Metal (M = Cr, Mn, Fe, Co, or Ni) Doped Zn_1−xM_xO Nanoparticles

Authors

Joshua Anghel, Boise State UniversityFollow
Aaron Thurber, Boise State UniversityFollow
Dmitri A. Tenne, Boise State UniversityFollow
Charles B. Hanna, Boise State UniversityFollow
Alex Punnoose, Boise State UniversityFollow

Document Type

Article

Publication Date

4-21-2010

Abstract

This work reports on transition metal doped ZnO nanoparticles and compares the effects doping with different transition metal ions has on the structural, optical, and magnetic properties. Zn_1−xM_xO (M = Cr, Mn, Fe, Co, or Ni) nanoparticles were prepared by a chemical process for x = 0.02 and 0.05 in powder form. The powders where characterized by x-ray diffraction (XRD), spectrophotometry, and magnetometry. The Zn_1−xM_xO samples showed a strong correlation between changes in the lattice parameters, bandgap energy, and the ferromagnetic saturation magnetization. Unit cell volume and bandgap, determined from XRD and spectrophotometry respectively, were maximized with Fe doping and decreased as the atomic number of the dopant moved away from Fe. Bandgap was generally lower at x = 0.05 than x = 0.02 for all dopants. The saturation magnetization reached a maximum of 6.38 memu/g for Zn_0.95Fe_0.05O.

Publication Information

Anghel, Joshua; Thurber, Aaron; Tenne, Dmitri A.; Hanna, Charles B.; and Punnoose, Alex. (2010). "Correlation Between Saturation Magnetization, Bandgap, and Lattice Volume of Transition Metal (M = Cr, Mn, Fe, Co, or Ni) Doped Zn_1−xM_xO Nanoparticles". Journal of Applied Physics, 107(9), 09E314-1 - 09E314-3. http://dx.doi.org/10.1063/1.3360189