Magnetoelectric, magnetodielectric and magneto-impedance couplings in Bi1−xNdxFe0.99Co0.01O3 compounds

Luiz Fernando Cotica,Lilian Felipe Da Silva Tupan,Daniel Matos Silva,Anuar José Mincache,Odair Gonçalves De Oliveira,Ivair Aparecido Dos Santos

doi:10.33448/rsd-v10i14.22189

Luiz Fernando Cotica, Lilian Felipe Da Silva Tupan + Show 4 more

Open Access

https://doi.org/10.33448/rsd-v10i14.22189

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Abstract

In this work Bi1−xNdxFe0.99Co0.01O3 ceramics compositions were synthesized for x = 0.05, 0.20 and, y = 0.01. Structural refinement results show that most of the samples crystallized in a rhombohedral symmetry with R3c. Measurements magnetoelectric coefficient, show that the magnetoelectric coefficients are of second order. The electrical impedance characterization of in function external magnetic fields, has a relative variation of the real dielectric response, the loss tangent and the electrical impedance. The systems, as the DC magnetic field strength increased a gain in both the values of the dielectric constant variation, as well as the variation of the electrical impedance. In other words, the greater the intensity of the magnetic field, the greater your response. There were also significant variations with of the magnetic field AC.

Highlights

Materials that simultaneously exhibit ferroic properties, such as magnetism, ferroelectricity and ferroelasticity are classified multiferroics (Tokura, Seki & Nagosa 2014) (Ramazanoglu et al 2011)
Is a promising material because it ferroeletric and magnetic room temperature, i.e. G-type antiferromagnetic order it has a transition of 640 K (Tn), while the ferroelectric order appears at about 1100 K (TC)
The samples were processed under the following conditions: the precursors were weighed and mixed in three stoichiometry. They went through high energy ball milling at 250 rotation per minute (RPM) for one hour

Summary

Introduction

Materials that simultaneously exhibit ferroic properties, such as magnetism, ferroelectricity and ferroelasticity are classified multiferroics (Tokura, Seki & Nagosa 2014) (Ramazanoglu et al 2011). A of the problems shown by other authors is the appearance of unwanted phases in the process phase of bismuth ferrite (Hasan et al 2016). A of the focus of this study is the dielectric measurements and impedances under action of an external magnetic field, classified as magnetodielectric and magnetoimpedance respectively. These phenomena have resumed the great demand for magnetic field sensitive materials and their range of applications (Phan & Peng 2007). The Bi1−xNdxFe0.99Co0.01O3 system was processed three samples thickness in the 1.2 mm and 5.4 mm diameter to make the characterizations

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