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Investigation on Multiferroic Properties and Conduction Mechanism in Cobalt Doped Bi0.9Nd0.1FeO3 Solid Solutions
Transactions of the Indian Ceramic Society ( IF 1.5 ) Pub Date : 2021-06-28 , DOI: 10.1080/0371750x.2021.1915874
Anil Kumar 1 , Preeti Sharm 1, 2 , Jaswinder Pal 3 , Anupinder Singh 4 , Rajender Singh Kundu 1 , Rajesh Punia 2
Affiliation  

Bi0.9Nd0. 1Fe1–xCoxO3 (x = 0.025, 0.050, 0.075 and 0.1) solid solutions have been synthesized by doping of Co3+ at the Fe3+ site using solid-state reaction method. The prepared solid solutions have been investigated for their structural, magnetic, ferroelectric and magneto-dielectric properties and conduction mechanism. The XRD study reveals that all the solid solutions possess a rhombohedral symmetry. The vibrating sample magnetometer study reveals that all the samples possess magnetic orders and the remnant magnetization has been found to be increased from 0.2388 emu/g for x = 0.025 to 0.7112 emu/g for x = 0.1. The non-Debye type dielectric relaxation has been investigated for all the samples. The frequency dependent ac conductivity data follows Jonscher’s Power law. Variation of exponent n versus temperature follows the overlapping large polaron tunneling conduction model. The maximum value of remanent polarization (∼0.152 μC/cm2) was found for x = 0.1. All the samples exhibit positive magneto-dielectric response in the low-frequency region with the highest magneto-capacitance value of 13.54% at 500 Hz for sample x = 0.1.



中文翻译:

钴掺杂Bi0.9Nd0.1FeO3固溶体多铁性及导电机理研究

Bi 0.9 Nd 0. 1 Fe 1– x Co x O 3 ( x = 0.025, 0.050, 0.075 and 0.1) 固溶体通过固相反应法在Fe 3+位点掺杂Co 3+合成。研究了制备的固溶体的结构、磁性、铁电和磁介电特性以及传导机制。XRD 研究表明所有固溶体都具有菱面体对称性。振动样品磁强计研究表明,所有样品都具有磁序,并且发现剩余磁化强度从 0.2388 emu/g 增加到x= 0.025 至 0.7112 emu/g,x = 0.1。已对所有样品研究了非德拜型介电弛豫。频率相关的交流电导率数据遵循 Jonscher 的幂定律。指数n随温度的变化遵循重叠的大极化子隧穿传导模型。当x = 0.1 时,发现剩余极化的最大值 (∼0.152 μC/cm 2 ) 。所有样品在低频区域均表现出正磁介电响应,样品x = 0.1在 500 Hz 时的最高磁电容值为 13.54% 。

更新日期:2021-06-29
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