کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1329064 978879 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of Cr and Mn ions on the structure and magnetic properties of GaFeO3: Role of the substitution site
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Effect of Cr and Mn ions on the structure and magnetic properties of GaFeO3: Role of the substitution site
چکیده انگلیسی

Effect of substitution of Cr and Mn in the Fe and Ga sites of GaFeO3 on the structural parameters and magnetic properties has been investigated by preparing GaFe1−xCrx(Mnx)O3 and Ga1−xCrx(Mnx)FeO3 starting with appropriate oxide precursors. It is shown that, starting with Cr or Mn substituted Ga2O3, one obtains Ga1−xCrx(Mnx)FeO3, while reaction of Cr or Mn substituted α-Fe2O3 with Ga2O3 yields GaFe1−xCrx(Mnx)O3. The structural parameters and magnetic properties vary significantly with the substitution site of Cr showing a large decrease in the unit cell parameters as well as the TC and other magnetic properties when the substitution is at the octahedral Fe (1, 2) site. Substitution of Cr at the octahedral Ga2 site results in marginal changes. Substitution of Mn in the Ga and Fe sites also show differences although the changes themselves are much smaller. First-principles calculations confirm such site-specificity and show how Cr substitution affects the properties differently when substituted at the Ga2 and Fe1 sites.

The important role of site-specific substitution of transition metal ions on the structure and magnetic properties of GaFeO3 has been investigated experimentally and theoretically.Figure optionsDownload as PowerPoint slideHighlights
► Substitution of transition metal ions to specific cation site.
► Ionic radii of the cation dictate the disorder associated with the specific site.
► Site-specificity explains magnetic ordering and structural parameters.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Solid State Chemistry - Volume 184, Issue 9, September 2011, Pages 2353–2359
نویسندگان
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