A structural and Mössbauer study of Y3Fe5O12 nanoparticles prepared with high energy ball milling and subsequent sintering

H. WIDATALLAH; C. JOHNSON; S. H AL-HARTHI; A. . M. GISMELSEED; A. D. AL- RAWAS; S. J. STEWART; M. E. ELZAIN; I. AL-OMARI; A.. A. YOSSIF

HYPERFINE INTERACTIONS

Año: 2008 vol. 183 p. 87 - 92

0304-3843

The influence of ball milling and subsequent sintering of a 3:5 molarmixture of Y2O3 and α-Fe2O3 on the formation of nanocrystalline Y3Fe5O12 (YIG)particles is studied. Pre-milling the mixture for 100 h lowers the onset temperature at which the material forms to 900 C which is 200 C lower than that reported whena similar mixture of reactants was premilled for shorter times. A single-phasednanocrystalline Y3Fe5O12 phase develops as a sole product when the pre-milledmixture is heated at 1,000◦C (12 h). This temperature is 300–400 C lower than thoseused to prepare the material conventionally. The bulk and surface crystal structure of the nanoparticles is studied with X-ray diffraction, Mössbauer spectroscopy, Atomic Force Microscope (AFM) and X-ray photoelectron spectroscopy.