NDLI: Mössbauer studies of Y3Fe5 − xAlxO12 nanopowders prepared by mechanochemical method

Content Provider	Springer Nature Link
Author	Azadi Motlagh, Z. Mozaffari, M. Amighian, J. Lehlooh, A. F. Awawdeh, M. Mahmood, S.
Copyright Year	2010
Abstract	A series of Al substituted yttrium iron garnet (Al-YIG) nanopowders with nominal formula of Y3Fe5 − x AlxO12 which x varied in steps of 0.0, 0.5, 1.0, 1.5 and 2.0 were prepared via mechanochemical processing. The samples were milled for 40 h in a high energy planetary mill and then calcined at different temperatures from 1,300 to 1,100°C. X-ray diffraction patterns reveal that the structure of nanopowders are bcc and the garnet phase has been obtained after calcining. The average crystallite sizes are in the range of 24–45 nm, using Scherrer’s formula. The lattice constant of the samples decreases by increasing Al concentration. To investigate the site preference of Al3 + ions, room temperature 57Fe Mössbauer spectra for the samples were recorded and analyzed. The hyperfine field values for octahedral and tetrahedral sites of the samples decrease by increasing x value. This decrease in magnetic hyperfine field reflects a reduction of the superexchange interaction by the progressive substitution of Al for Fe, which is also evident in the behavior of the magnetization and T C for the samples.
Starting Page	295
Ending Page	302
Page Count	8
File Format	PDF
ISSN	03043843
Journal	Hyperfine Interactions
Volume Number	198
Issue Number	1-3
e-ISSN	15729540
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-01
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Yttrium Iron Garnet Mössbauer effect Nanopowders Hyperfine interaction Surfaces and Interfaces, Thin Films Condensed Matter Physics Atomic, Molecular, Optical and Plasma Physics Nuclear Physics, Heavy Ions, Hadrons
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Atomic and Molecular Physics, and Optics Physical and Theoretical Chemistry Condensed Matter Physics

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