کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7886798 | 1509786 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Room temperature multiferroic behavior and magnetoelectric coupling in (K,Na)NbO3-based ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Polycrystalline (K0.48Na0.52)0.95Li0.05(Nb0.95Sb0.05)1-xFexO3 (0â¯â¤â¯xâ¯â¤â¯0.030) ceramics are synthesized by the conventional solid state reaction method. The samples with 0.010â¯â¤â¯xâ¯â¤â¯0.030 are found to possess good ferroelectricity, weak ferromagnetism and large magnetodielectric effect simultaneously at room temperature. Temperature dependence of magnetization and dielectric properties show that there are both magnetic and magnetodielectric anomalies in the vicinity of the ferroelectric rhombohedral-orthorhombic (TR-O) and orthorhombic-tetragonal (TO-T) phase transition temperatures. Furthermore, magnetodielectric effect as large as 16% is observed at 0.9â¯T near TR-O when xâ¯=â¯0.030. According to these results, a strong spin-lattice coupling is considered to exist in these samples. In the structure transition process, the spin interactions between Fe ions will alter for the severe distortion of the FeO6 octahedron. Moreover, since there are more possible polarization vectors due to polymorphic phase transition (PPT), the local polarization of FeO6 will also be greatly affected when the external magnetic field changes the spin interactions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 12, 15 August 2018, Pages 14169-14176
Journal: Ceramics International - Volume 44, Issue 12, 15 August 2018, Pages 14169-14176
نویسندگان
Min Zhou, Xiaomei Lu, Xingyu Xu, Lin Liu, Lin Lei, Shuyu Xiao, Fengzhen Huang, Xiaomin Wang, Jinsong Zhu,