Chemical disorder induced positive magnetoimpedance in La0.7Pb0.3Mn0.35Fe0.65O3-δ and La0.7Pb0.3Mn0.3Fe0.7O3-δ manganites

被引：1

作者：

Singh, Priyanka ^{[1
]}

Singh, Brajendra ^{[1
]}

Gupta, Mukul ^{[2
]}

机构：

[1] Univ Allahabad, Ctr Mat Sci, Mat Chem Lab, Allahabad 211002, Uttar Pradesh, India

[2] UGC DAE Consortium Sci Res, Univ Campus,Khandwa Rd, Indore 452017, India

来源：

EUROPEAN PHYSICAL JOURNAL-APPLIED PHYSICS | 2021年 / 93卷 / 03期

关键词：

D O I：

10.1051/epjap/2021200333

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report structural, magnetic and magnetoimpedance properties of La0.7Pb0.3Mn0.35Fe0.65O3-delta and La0.7Pb0.3Mn0.3Fe0.7O3-delta manganites. Bulk samples were prepared by solid state method. Rietveld refinement of the X-ray diffraction pattern shows the crystallization of these samples in trigonal crystal system. Fe doping at Mn site in La0.7Pb0.3MnO3 increases the lattice parameters and induces oxygen non stoichiometry in the lattice of La0.7Pb0.3Mn0.35Fe0.65O3-delta and La0.7Pb0.3Mn0.3Fe0.7O3-delta. La0.7Pb0.3Mn0.3Fe0.7O3-delta composition shows similar to 180% positive magnetoimpedance at 1 Tesla magnetic field while La0.7Pb0.3Mn0.35Fe0.65O3-delta shows similar to 75% positive magnetoimpedance at 320K. Magnetization versus applied magnetic field measurement curves show the magnetic moment of La0.7Pb0.3Mn0.35Fe0.65O3-delta and La0.7Pb0.3Mn0.3Fe0.7O3-delta do not saturate up to 2 tesla magnetic field at 300K. Fe+3 doping at Mn site in these manganites created chemically modified phase separated systems. Huge positive magnetoimpedance in 65% and 70% Fe doped manganites originated by maxwell wagner effect due to the chemical disorder induced phase separated states and dominated coulombic interactions.

引用

页数：8

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