Structural, electrical, and magnetic characterization of (1-x) BaTiO3-x Ni0.6Zn0.4Fe2O4 multiferroic ceramic composites

G. Mowla, N. Hossain, M. Kabir, M. Haque, M. Ali, M. A. Kaiyum, M. Rahman
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引用次数: 1

Abstract

In the present work, pure BaTiO3, pure Ni0.6Zn0.4Fe2O4 and (1-x)BaTiO3-xNi0.6Zn0.4Fe2O4 (where x = 0.15, 0.25 & 0.35) multiferroic composites were synthesized through solid-state sintering scheme. Structural, microstructural, ferroelectric, and ferromagnetic analysis was performed. Both tetragonal perovskite phase (for BaTiO3 ferroelectric phase) and cubic spinel ferrite phase (for Ni0.6Zn0.4Fe2O4 ferromagnetic phase) were simultaneously presented within each composite. The ferrite phase exhibited a smaller crystallite size compared to the ferroelectric phase. All of the composites demonstrated homogenous irregular-shaped grains. The measured average grain size for 0.85BaTiO3-0.15Ni0.6Zn0.4Fe2O4, 0.75BaTiO3-0.25Ni0.6Zn0.4Fe2O4, 0.65BaTiO3-0.35Ni0.6Zn0.4Fe2O4 were 364.14 nm, 378.46 nm and 351.62nm, whereas the density values were 3.04g/cm3, 3.20g/cm3 and 3.13 g/cm3 for x = 0.35, 0.25, 0.15 respectively. However, the heterogenous microstructure was observed for all of the compositions. The composites exhibited an oval-shaped lossy capacitor hysteresis loop. However, 0.75BaTiO3-0.25Ni0.6Zn0.4Fe2O4 composite showed the highest remnant polarization (11.613 μC/cm2) and coercive field value (1.526 kV/cm), ensuring its usability for switching applications. In addition, 0.75BaTiO3-0.25Ni0.6Zn0.4Fe2O4 also exhibited the maximum saturation (Ms= 1.732 emu/g) and remnant magnetization (Mr= 0.025 emu/g) among the composites. Nevertheless, all of the composites derived 'wasp-waisted' hysteresis loops due to the presence of either superparamagnetic (SPM) particles or a mixer of a single domain (SD) and superparamagnetic particles.
(1-x) BaTiO3-x Ni0.6Zn0.4Fe2O4多铁陶瓷复合材料的结构、电学和磁性表征
本文采用固相烧结法合成了纯BaTiO3、纯Ni0.6Zn0.4Fe2O4和(1-x)BaTiO3- xni0.6 zn0.4 fe2o4(其中x = 0.15、0.25和0.35)多铁复合材料。进行了结构、微观结构、铁电和铁磁分析。在每种复合材料中同时存在四方钙钛矿相(对于BaTiO3铁电相)和立方尖晶石铁素体相(对于Ni0.6Zn0.4Fe2O4铁磁相)。与铁电相相比,铁素体相的晶粒尺寸更小。所有复合材料均表现出均匀的不规则形状晶粒。0.85BaTiO3-0.15Ni0.6Zn0.4Fe2O4、0.75BaTiO3-0.25Ni0.6Zn0.4Fe2O4、0.65BaTiO3-0.35Ni0.6Zn0.4Fe2O4的平均晶粒尺寸分别为364.14 nm、378.46 nm和351.62nm,而x = 0.35、0.25、0.15时的密度分别为3.04g/cm3、3.20g/cm3和3.13 g/cm3。然而,在所有的成分中都观察到异质组织。复合材料呈现椭圆形损耗电容滞回线。而0.75BaTiO3-0.25Ni0.6Zn0.4Fe2O4复合材料则表现出最高的残余极化(11.613 μC/cm2)和矫顽力场值(1.526 kV/cm),确保了其在开关领域的可用性。此外,0.75BaTiO3-0.25Ni0.6Zn0.4Fe2O4也表现出最大的饱和度(Ms= 1.732 emu/g)和剩余磁化强度(Mr= 0.025 emu/g)。然而,由于存在超顺磁(SPM)粒子或单畴(SD)和超顺磁粒子的混合,所有的复合材料都产生了“黄蜂腰”磁滞回线。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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