Synthesis, Electric and Magnetic Characterization of Nickel Ferrite/PANI Nano-Composite Prepared by Flash Auto Combustio
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Synthesis, Electric and Magnetic Characterization of Nickel Ferrite/ PANI Nano‑Composite Prepared by Flash Auto Combustion Method A. M. A. Henaish1,2 · M. M. Ali1 · D. E. El Refaay3,4 · I. A. Weinstein2,5 · O. M. Hemeda1 Received: 30 June 2020 / Accepted: 29 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract NiFe2O4/PANI nano-composite with different polyaniline (PANI) content (25%, 50% and 75%) is synthesized. The NiFe2O4 (NF) is prepared by the flash auto combustion method and annealed at 400 °C for 2 h. The PANI is prepared by oxidative polymerization of aniline. The X-ray diffraction (XRD) technique confirmed that the NiFe2O4 particles are successfully dispersed in the PANI matrix with single phase structure. The characteristic absorption bands are observed from infrared � (IR) spectra for the pure NF, pure PANI and their nano-composite. The dielectric constant ( 𝜀 ) behavior of NF/PANI nanocomposite at higher PANI content tends to be a polymer behavior. The Curie temperature decreased by increasing the PANI content and it is attributed to the basis of A-B exchange interaction due to the variation of Fe3+ content among the octahedral and tetrahedral sites. The values of the saturation magnetization (Ms), remanence magnetization (Mr), coercivity (Hc), area and squareness (Mr/Ms) are measured by using a vibrating sample magnetometer (VSM). Keywords Ni ferrite · PANI · Flash auto combustion · XRD · DC resistivity · Dielectric constant · VSM
1 Introduction In the last decades, Microwave absorption materials have attracted greater interest due to its ability to absorb electromagnetic (EM) wave effectively and convert it into thermal energy by interference [1–3]. Microwaves absorbing materials can be classified into dielectric loss materials as conducting polymers (CPs) and magnetic loss materials according to different absorbing mechanisms as in ferrite [4–6]. Conducting polymers (CPs) such as PANI have become an expanding research area and PANI is the most promising conductive polymer with excellent environmental stability, * A. M. A. Henaish [email protected] 1
Physics Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
2
NANOTECH Center, Ural Federal University, Ekaterinburg 620002, Russia
3
Physics Department, Faculty of Science, King Khalid University, Abha, Saudi Arabia
4
Physics Department, Faculty of Science, Suez University, Suez, Egypt
5
Institute of Metallurgy of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg 620016, Russia
electrochemical activity, high electrical conductivity, facile synthesis, and low synthetic cost, which could be used as microwave absorbing materials [7, 8]. NiFe2O4 is one of the most important spinel ferrites which, has known as a soft ferrite with low coercivity, saturation magnetization, chemical stability and high electrical resistivity so it can be used as a magnetic resonance imaging (MRI) enhancement, magnetic recording media, color imaging, ferro-fluids, high fre
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