Study of Fe-doped ZnO by Mechanical Alloying

• Published in: Journal of superconductivity and novel magnetism Vol. 25; no. 7; pp. 2223 - 2226
• Main Authors: Piamba, J. F., Paz, J. C., Zamora, Ligia E., Pérez Alcázar, G. A.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Boston Springer US 01-10-2012; Springer
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cross-disciplinary physics: materials science; rheology; Diamagnetism, paramagnetism and superparamagnetism; Exact sciences and technology; Iron; Magnetic Materials; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Magnetism; Materials science; Materials synthesis; materials processing; Mechanical alloying; Mechanical milling; Mossbauer effect; Mössbauer effect; other γ-ray spectroscopy; Original Paper; Physics; Physics and Astronomy; Spectra; Spectrometry; Strongly Correlated Systems; Studies of specific magnetic materials; Superconductivity; Zinc oxide; X-ray diffraction; ZnO; Mechanical alloying; Mössbauer spectrometry; Moessbauer effect; Inorganic compounds; Transition element compounds; Paramagnetism; Ferromagnetic materials; Iron; XRD; II-VI semiconductors; Transition elements; Paramagnetic materials; Wurtzite structure; Zinc oxide; Iron additions; Solubility limit
• ISSN: 1557-1939; 1557-1947
• DOI: 10.1007/s10948-012-1652-8

Zn
100−
x
OFe
x
samples were obtained by mechanical alloying (MA) with different milling times. The purpose of this work was to analyze the variation of hyperfine parameters of the system with milling time. X-ray patterns show that pure ZnO under mechanical milling is not contaminated; additionally the system obtained by mechanical alloying has a wurtzite structure similar to pure ZnO. Mössbauer spectra show that all samples present two phases: paramagnetic and ferromagnetic. The milling time contributes to increase the paramagnetic phase; however, the Mössbauer spectra taken for samples milled during 36 and 99 hours indicates that there is a solubility limit for Fe atoms in ZnO lattice due that the spectra area remains nearly constant after 36 h. Mössbauer spectrometry shows that the Fe atoms which penetrate inside the ZnO matrix behave like Fe
3+
and Fe
2+
.