Ferromagnetic properties of Fe-substituted ZnO-based magnetic semiconductor

The diluted magnetic semiconductor Zn 1− x 57Fe x O ( x=0.01, 0.02, 0.03) compounds were prepared by the solid-state reaction method. The crystal structure of Zn 0.97 57 Fe 0.03 O at room temperature is determined to be a hexagonal structure of P6 3mc with lattice constants a 0=3.252 Å and c 0=5.205...

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Published inJournal of magnetism and magnetic materials Vol. 304; no. 2; pp. e498 - e500
Main Authors Ahn, Geun Young, Park, Seung-Iel, Kim, Sam Jin, Kim, Chul Sung
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.2006
Subjects
Magnetic semiconductor
Mössbauer spectroscopy
ZnO
75.50.Pp
Magnetic semiconductor
ZnO
76.80.+y
Mössbauer spectroscopy
61.10.−I
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Summary:The diluted magnetic semiconductor Zn 1− x 57Fe x O ( x=0.01, 0.02, 0.03) compounds were prepared by the solid-state reaction method. The crystal structure of Zn 0.97 57 Fe 0.03 O at room temperature is determined to be a hexagonal structure of P6 3mc with lattice constants a 0=3.252 Å and c 0=5.205 Å by Rietveld refinement. The Bragg factors R B and R F were determined as 3.23% and 2.81%. From the inverse susceptibility versus T curve, the paramagnetic Curie temperature is found to be 2.7 K and effective moment is found to be 4.01 μ B, thereby suggesting that the exchange interactions between Fe ions are ferromagnetic. Mössbauer spectra of Zn 0.97 57 Fe 0.03 O have been taken at various temperatures ranging from 4.2 to 295 K. Mössbauer spectrum for Zn 0.97 57 Fe 0.03 O at 4.2 K has shown ferromagnetic phase (sextet), and the spectra were fitted based on a random distribution model of Fe ions.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.02.135