Structural, chemical and low-temperature magnetic properties of lead-Free 0.6NiFe2O4-0.4Na0.5Bi0.5TiO3 magnetoelectric composite

G Jagadish Kumar,M Sarathbavan,E Senthil Kumar,M Navaneethan,K Kamala Bharathi

doi:10.1007/s10854-021-06184-y

G Jagadish Kumar, M Sarathbavan + Show 3 more

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https://doi.org/10.1007/s10854-021-06184-y

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Abstract

We report on structural, chemical and low-temperature magnetic properties of lead-free 0.6NiFe2O4-0.4Na0.5Bi0.5TiO3 composite. NiFe2O4 (NFO) and Na0.5Bi0.5TiO3 (NBTO) are seen to crystallize in inverse spinel and perovskite structure, respectively. 0.6NiFe2 O4-0.4Na0.5Bi0.5TiO3 composite exhibits both NFO and NBTO phases in appropriate composition. Zero field-cooled (ZFC) and field-cooled (FC) magnetization measurements carried out from 15 to 300 K shows a large bifurcation at room temperature. ZFC and FC magnetization measurement exhibit a hump at Tm \(\sim\)259.5 K, indicates the possible existence of competing magnetic interactions in 0.6NiFe2 O4-0.4Na0.5Bi0.5TiO3 composite. Saturation magnetization, remnant magnetization and coercivity values are observed to increase with decreasing the temperature. Temperature-dependent saturation magnetization is fit to the Bloch’s law. Magnetocrystalline anisotropy (K1) value at various temperatures are estimated and is seen to increase from 0.23 × 104 erg/cc (at 300 K) to 0.34 × 104 erg/cc (at 15 K).

Highlights

Multiferroic materials exhibit more than one ferroic property, which make them highly suitable for applications in spintronics, data storage devices, processors, controllers and sensors [1,2,3]
The magnetoelectric composite consisting of BaTiO3 and Ni (Co, Mn)Fe2O4 prepared by unidirectional solidification show two order high ME coefficient at room temperature than single phase Cr2O3 [8]
Small hump in Zero field cooled (ZFC) magnetization is seen to be present at 259.5 K, noted as Tm, indicating the possibility of existance of short range ferromagnetic clusters which freezes into different metastable energy states

Summary

E Senthil Kumar SRM Institute of Science and Technology

Keywords: NiFe2O4-Na0.5Bi0.5TiO3 composite, Magnetocrystalline anisotropy, Magnetization, Zero eld cooled magnetization, Field cooled magnetization License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Structural, Chemical and Low Temperature Magnetic Properties of Lead Free 0.6NiFe2O4 - 0.4Na0.5Bi0.5TiO3 Magnetoelectric Composite G. Jagadish Kumara, M. Sarathbavanb, E. Senthil Kumara,b, M. Navaneethana,b, K. Kamala Bharathia,b,* a Nanotechnology Research Center (NRC), Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India b Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chennai 603203, Tamil Nadu, India

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