节点文献

脉冲激光沉积(La_0．2Bi_0．8FeO₃)_0．8-（NiFe₂O₄）_0．2薄膜及其多铁性能研究

Multiferroic Properties of(La_0.2Bi_0.8FeO₃)_0.8-（NiFe₂O₄）_0.2Films Grown by Pulse Laser Deposition

推荐 CAJ下载
PDF下载
不支持迅雷等下载工具，请取消加速工具后下载。

【Author】 LI Xiang-Cheng~(1,3) YANG Guang~1 DAI Neng-Li~1 CHEN Ai-Ping~1 LONG Hua~1 YAO Kai-Lun~2 LU Pei-Xiang~1 (1.Division of Laser Science and Technology,Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China;2.Department of Physics,Huazhong University of Science and Technology,Wuhan 430074,China;3.The Hubei Province Key Laboratory of Ceramics and Refractories,Wuhan University of Science and Techrology,Wuhan 430081,China)

【机构】华中科技大学武汉光电国家实验室激光科学与技术研究部；华中科技大学物理系；

【摘要】采用脉冲激光沉积法,在（100）SrTiO₃基底上,制备了(La_0.2Bi_0.8FeO₃)_0.8-（NiFe₂O₄）_0.2（LBFO-NFO）多铁薄膜,通过X射线衍射仪和场发射扫描电子显微镜确定了LBFO-NFO多铁薄膜的显微结构,通过标准铁电测试系统（RT-66A）和振动样品磁强计（VSM）分别测试了LBFO-NFO多铁薄膜的铁电性能和铁磁性能.研究发现:多铁薄膜中LBFO和NFO二相均沿（100）方向外延生长,晶粒尺寸在100～150nm之间;薄膜具有明显的电滞回线（P₌7.6μC/cm²）和磁滞回线（M_s=4.12×10⁴A/m）,显示出明显的铁电铁磁共存特性.通过对薄膜生长条件的控制,可削除杂质相,减小LBFO-NFO薄膜的漏电流,提高铁电及铁磁性能.更多还原

【Abstract】 (La_0.2Bi_0.8FeO₃)-（0.8）-（NiFe₂O₄）_0.2（LBFO-NFO）thin films were grown on（100）SrTiO₃ substrates by pulse laser deposition.X-ray diffraction and Field Emission Scanning Electronic Mi- crogrape studies confirm that the phases of LBFO and NFO in the films grow along the direction of （100）and the particle sizes of the two phases are about 100-150nm,respectively.The ferroelectric and ferromagnetic hysteresis of the films measured with a standardized ferroelectric test system（RT-66A, Radiant technologies）and vibrating sample magnetometer（VSM）show that the saturation polarization and magnetization are 7.6λC/cm² and 4.12×10⁴A/m respectively,which indicates that LBFO-NFO films possess multiferroic properties obviously.By controlling the growth condition of the films,the leakage current of LBFO-NFO films can be decreased.Accordingly,the ferroelectric and ferromagnetic properties can be enhanced greatly.更多还原