A comparative study of magneto-capacitance with magneto-electric coupling and transport response of 0.5LaFeO3-0.5PbZr0.58Ti0.42O3 nanocomposite

IF 2.5 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Applied Physics A Pub Date : 2025-01-21 DOI:10.1007/s00339-025-08267-7

Debajyoti Nath, Harsh Sharma, Rajib Mallik

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Abstract

The effects of magnetic field on magnetoelectric coupling, dielectric and transport properties of 0.5LaFeO₃-0.5PbZr_0.58Ti_0.42O₃ nanocomposites are investigated at room temperature. The maximum value of magnetoelectric coupling is found to ~ 1.3 and ~ 0.2 mV/cm-Oe, which approves the multiferroic in nature, it may agree with the strain mediated piezomagnetic phase and magnetocapacitance property of the material. The observed magneto-capacitance (~ 23%) at lower frequency attributes to the interface or space charge polarization of sample as the Maxwell-Wagner effect. The classical electrodynamics effect is the main reason for the magnetoimpedance behaviour (~ 50%) at room temperature. The involvement of grain and grain boundaries effect may takes dominating role on conductivity, which is illustrated from the impedance and modulus diagrams assigned the non-Debye type phenomena. The relaxation frequency is changed by an application of magnetic field corroborating the spin dependent electrical transport mechanism at the grain boundaries. The decreasing nature of ac conductivity with applied magnetic field characterizes the presence of defect states in interfaces of LaFeO₃ and PbZr_0.58Ti_0.42O₃ grains. Also, it may agree to the occurance of strain mediation of piezomagnetic phase of the system. Also this composite may corresponds to the occurance of strain mediation of piezomagnetic phase and magnetodielectric effect.

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0.5LaFeO3-0.5PbZr0.58Ti0.42O3纳米复合材料磁电耦合及输运响应的对比研究

研究了室温下磁场对0.5LaFeO3-0.5PbZr0.58Ti0.42O3纳米复合材料磁电耦合、介电和输运性能的影响。磁电耦合的最大值分别为~ 1.3 mV/cm-Oe和~ 0.2 mV/cm-Oe，证实了材料的多铁性，这与材料的应变介导的压磁相位和磁电容特性是一致的。观察到的低频率磁电容（~ 23%）归因于样品的界面或空间电荷极化，即麦克斯韦-瓦格纳效应。经典电动力学效应是室温下磁阻抗行为（~ 50%）的主要原因。晶粒的参与和晶界效应可能对电导率起主导作用，这从非debye型现象的阻抗和模量图中可以看出。磁场的作用改变了弛豫频率，证实了晶界处自旋相关的电输运机制。在外加磁场作用下，LaFeO3和PbZr0.58Ti0.42O3晶粒的交流电导率呈下降趋势。此外，它也可能同意系统的压磁相的应变中介的发生。这种复合可能对应于压磁相应变中介和磁介电效应的发生。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Physics A 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.40%

发文量

964

审稿时长

38 days

期刊介绍： Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.