کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1606080 | 1516222 | 2016 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low-temperature structural and magnetic phase transitions in multiferroic GdFe3(BO3)4
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
X-ray analysis revealed that at temperature decreasing from room temperature to Tstr = 155 K the crystal unit cell GdFe3(BO3)4 is reduced only along the c axis (at 0.01 Ã
), while the a and b axes are unchanged within the error limits. The volume of the crystal decreases uniformly in the direction of all three axes at 155-80Â K. At 80-30Â K the crystal volume is decreased only by reduction of the parameters a and b, while the parameter c increases conversely. In the paramagnetic region Mössbauer spectra do not distinguish between the two structural positions of iron ions Fe1 and Fe2, appearing at TÂ <Â Tstr. Below the temperature of the magnetic phase transition at TNÂ =Â 38.0(1) K the Mössbauer data indicate quasi-one-dimensional magnetic ordering of iron moments in the sublattice Fe2 and a two-dimensional one in the iron sublattice Fe1. The dynamics of spin reorientation in sublattices Fe1 and Fe2 is studied in detail.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 671, 25 June 2016, Pages 545-551
Journal: Journal of Alloys and Compounds - Volume 671, 25 June 2016, Pages 545-551
نویسندگان
K.V. Frolov, I.S. Lyubutin, E.S. Smirnova, O.A. Alekseeva, I.A. Verin, V.V. Artemov, S.A. Kharlamova, L.N. Bezmaternykh, I.A. Gudim,