Effect of Co substitution on the structural,electrical,and magnetic properties of Bi0.9La0.1FeO3 by sol-gel synthesis
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第2期
论文作者：Ghulam Ali Saadat A.Siddiqi Shahid M.Ramay Shahid Atiq Murtaza Saleem
文章页码：166 - 171
摘 要：Cobalt（Co）-doped Bi0.9La0.1FeO3 multiferroics were synthesized by a sol-gel method based on the autocombustion technique.As-synthesized powder was examined using various characterization techniques to explore the effect of Co substitution on the properties of Bi0.9La0.1FeO3.X-ray diffraction reveals that Co-doped Bi0.9La0.1FeO3 preserves the perovskite-type rhombohedral structure of BiFeO3,and the composition without Co preserves the original structure of the phase;however,a second-phase Bi2Fe4O9 has been identified in all other compositions.Surface morphological studies were performed by scanning electron microscopy.Temperature-dependent resistivity of the samples reveals the characteristic insulating behavior of the multiferroic material.The resistivity is found to decrease with the increase both in temperature and Co content.Room temperature frequency-dependent dielectric measurements were also reported.Magnetic measurements show the enhancement in magnetization with the increase in Co content.
Ghulam Ali1，Saadat A.Siddiqi1,2，Shahid M.Ramay3，Shahid Atiq1，Murtaza Saleem1
1. Centre of Excellence in Solid State Physics,University of the Punjab2. Interdisciplinary Research Centre in Biomedical Materials,COMSATS Institute of Information Technology3. Chemical Engineering Department,College of Engineering,King Saud University
摘 要：Cobalt（Co）-doped Bi0.9La0.1FeO3 multiferroics were synthesized by a sol-gel method based on the autocombustion technique.As-synthesized powder was examined using various characterization techniques to explore the effect of Co substitution on the properties of Bi0.9La0.1FeO3.X-ray diffraction reveals that Co-doped Bi0.9La0.1FeO3 preserves the perovskite-type rhombohedral structure of BiFeO3,and the composition without Co preserves the original structure of the phase;however,a second-phase Bi2Fe4O9 has been identified in all other compositions.Surface morphological studies were performed by scanning electron microscopy.Temperature-dependent resistivity of the samples reveals the characteristic insulating behavior of the multiferroic material.The resistivity is found to decrease with the increase both in temperature and Co content.Room temperature frequency-dependent dielectric measurements were also reported.Magnetic measurements show the enhancement in magnetization with the increase in Co content.
关键词：
