Abstract

Samarium modified 0.6BiFeO₃–0.4BaTiO₃ multiferroic ceramics have been prepared through solid state reaction technique. XRD data confirms the tetragonal phase structure of the prepared materials. The SEM exhibits the compactness of the compound with uniform grain distribution on the surface. The frequency and temperature dependence dielectric properties have shown the normal ferroelectric behavior. Impedance measurements confirm a non-Debye type relaxation mechanism. Grain resistance and grain capacitance have calculated through Nyquist plot. Ac conductivity with temperature reveals the NTCR behavior of the materials. The activation energy ($E_{\mathrm{a}}$) has been estimated from temperature dependence ac conductivity. Multiferroic nature of the materials confirms through the P-E and M-H measurements.

摘要

通过固态反应技术制备了modified改性的0.6BiFeO ₃ –0.4BaTiO ₃多铁陶瓷。XRD数据证实了所制备材料的四方相结构。SEM显示出化合物的致密性，其表面具有均匀的晶粒分布。频率和温度相关的介电特性已显示出正常的铁电行为。阻抗测量证实了非德拜型弛豫机制。晶粒电阻和晶粒电容通过奈奎斯特图计算得出。交流电随温度变化揭示了材料的NTCR行为。活化能（$E_{\mathrm{一种}}$）是根据与温度相关的交流电导率估算的。材料的多铁性通过PE和MH测量得到证实。