Ferroelectrics ( IF 0.8 ) Pub Date : 2021-01-11 Sarit Chakraborty, S. K. Mandal
Abstract
Magnetoelectric Zn0.5Co0.5Fe2O4 – PbZr0.58Ti0.42O3 nanocomposites are synthesized considering chemical reaction process at low temperature and solid-state reaction technique. Structural characterization is performed by X-ray diffraction analysis, which shows two types of nanometric grains coexisting simultaneously. The materials surface morphology displays that the fabrication method is quite effective for preparation of nanocomposites. Crystallite size of different constituent phases is observed to in manometer range. The dependency of temperature on electrical response and dielectric constant of nanocomposites are analyzed with a variation of frequency. The dielectric constant with temperature decreases attributing the thermal excitation of electrons. Moreover, we have evaluated the magnetoelectric coefficient in two configurations (longitudinal and transverse) with increasing applied magnetic field. The coupling coefficient is observed to ∼0.8 mV/cm-Oe in transverse configuration, whereas in longitudinal configuration it is increasing in behavior with measured magnetic field. At room temperature, the observing magnetoelectric coupling may be as a cause of magnetic field dependent strain transfer to the piezoelectric phase to the piezomagnetic phase of the nanocomposites.
中文翻译:
多铁纳米复合材料的温度响应和磁电耦合
摘要
磁电Zn 0.5 Co 0.5 Fe 2 O 4 – PbZr 0.58 Ti 0.42 O 3考虑低温化学反应过程和固态反应技术合成纳米复合材料。通过X射线衍射分析进行结构表征,结果显示两种类型的纳米晶粒同时存在。材料表面形态学表明,该制备方法对制备纳米复合材料非常有效。观察到不同组成相的微晶尺寸在压力计范围内。分析了温度对纳米复合材料电响应和介电常数的依赖性,并分析了其频率变化。介电常数随温度降低而归因于电子的热激发。此外,随着施加磁场的增加,我们已经评估了两种配置(纵向和横向)的磁电系数。在横向构型中观察到的耦合系数为〜0.8 mV / cm-Oe,而在纵向构型中,耦合系数随着测量的磁场而增加。在室温下,观察到的磁电耦合可能是由于磁场相关的应变传递到纳米复合材料的压电相到压电相的原因。