کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7991304 1516139 2018 20 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tunable magnetization and relaxor ferroelectric nature in cobalt-substituted tungsten bronze Ba4Nd2Fe2Nb8O30
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Tunable magnetization and relaxor ferroelectric nature in cobalt-substituted tungsten bronze Ba4Nd2Fe2Nb8O30
چکیده انگلیسی
The structural, magnetic and dielectric properties of tungsten bronze Ba4Nd2Fe2-xCoxNb8O30 (0 ≤ x ≤ 1) ceramics are investigated. The room-temperature ferromagnetic (FM) behavior with rather high FM transition temperature Tc can be observed in the Co-doped samples compared with the antiferromagnetic (AFM) interaction in the sample Ba4Nd2Fe2Nb8O30. The ferromagnetism can be understood in terms of spin canting of the AFM coupling of the Fe-based and Co-based sublattices via Dzyaloshinsky-Moriya interaction. All the samples exhibit the nature of relaxor ferroelectric. In addition, two thermally activated dielectric relaxations can be found in all the samples. The first one corresponds to a relaxor-like relaxation which obeys well Vogel-Fulcher relation, whereas the second one follows with Arrhenius Law and can be attributed to the localized hopping of electrons.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 755, 30 July 2018, Pages 73-78
نویسندگان
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