Magneto-electric features of BaFe_9.5Al_1.5CrO₁₉-CaCu₃Ti₄O₁₂ nanocomposites

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• 作者：Akbar Hojjati-Najafabadi ; Ali Ghasemi ; ^{ali13912001@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Reza Mozaffarinia
• 关键词：Electrical properties ; Magnetic properties
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：244-249
• 全文大小：1328 K

文摘

BaFe_9.5Al_1.5CrO₁₉-xCaCu₃Ti₄O₁₂ nanocomposites were prepared by a solid-state technique. The X-ray diffraction and field emission scanning electron microscopy were employed for evaluation of structural and morphological features. The electrical properties of samples were evaluated by ferroelectric tester. The vibrating sample magnetometer was employed for the analysis of magnetic properties of specimens. The microwave characteristics of BaFe_9.5Al_1.5CrO₁₉-30CaCu₃Ti₄O₁₂ by controlling matching thickness were also characterized by a vector network analyzer. The CaCu₃Ti₄O₁₂ and nanocomposites exhibited ferroelectric behavior. The obtained results confirmed that the dielectric constant of CaCu₃Ti₄O₁₂ did not undergo an abrupt variation with an increase in temperature and frequency. The spontaneous polarization and coercive field declined by addition of CaCu₃Ti₄O₁₂. The coercive field was increased due to the surface anisotropy in BaFe_9.5Al_1.5CrO₁₉-CaCu₃Ti₄O₁₂ interface.