کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1802314 | 1024595 | 2010 | 7 صفحه PDF | دانلود رایگان |
Samples of the mixed spinel ferrite series Mg(0.9+x)Fe2(1−x)Ni0.1TixO4 with x=0.5 and 0.6, prepared by solid state reaction of the appropriate oxides, have been investigated with 57Fe Mössbauer spectroscopy. The as-prepared samples are found to be mainly superparamagnetic due to magnetic cluster formation. Samples after at least three times reheated exhibit spectra, which can be rather interpreted by a transversal relaxation of the spin above and spin-glass behaviour below the respective freezing temperatures Tf. External-field spectra reveal the canting to occur only on the octahedral sites. From the derived transition temperatures and thresholds together with data from earlier investigated sample with x=0.7 a compositional magnetic phase diagram for this spinel series is obtained.
Journal: Journal of Magnetism and Magnetic Materials - Volume 322, Issue 5, March 2010, Pages 510–516