Investigation of structural, optical, electrical, and magnetic properties of Fe‐doped La0.7Sr0.3MnO3 manganites. Issue 5 (26th May 2020)

• Record Type: Journal Article
• Authors: Hassan, Abdullah Ameen Saad; Khan, Wasi; Husain, Shahid; Dhiman, Pooja; Singh, Mahavir
• Is Part Of: International journal of applied ceramic technology. Volume 17:Issue 5(2020)
• Page Start: 2430
• Page End: 2438
• Publication Date: 2020-05-26
• Subjects: electrical properties -- electron microscopy -- ferromagnetism -- nanostructures -- optical studies; Ceramics -- Periodicals; Ceramics -- Technological innovations -- Periodicals; 620.1405
• DOI: 10.1111/ijac.13540
• Languages: English
• ISSNs: 1546-542X

Abstract

Abstract: In this work, the physical properties of nanocrystalline samples of La0.7 Sr0.3 Mn1− x Fe x O3 (0.0 ≤ x ≤ 0.20) perovskite manganites synthesized by the reverse micelle (RM) technique were explored in detail. The phase purity, crystal structure, and crystallite size of the samples were determined using X‐ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. All the samples had rhombohedral crystal structure and crystallite size increased with increase in Fe content in La0.7 Sr0.3 MnO3 . The scanning electron micrographs (SEMs) exhibited smooth surface morphology and nonuniform shape of the particles. The optical properties studied using UV‐visible absorption spectroscopy revealed a decrease in the absorbance and optical band gap with an increase in Fe content in La0.7 Sr0.3 MnO3 compound. The temperature‐dependent resistivity measurements revealed semiconducting nature of x = 0 and 0.1 samples up to the studied temperature range, while a metal‐to‐insulator transition was observed at higher Fe doping. Magnetic studies revealed weak ferromagnetism in all the samples and a reduction in the maximum magnetization with an increase in Fe content. A close correlation between electrical transport and magnetic properties was observed with the doping of Fe ion in La0.7 Sr0.3 MnO3 at Mn site. These results advocate strong interactions associated with the double exchange mechanism among Fe 3+ and Mn 3+ ions. Abstract : The structural, optical, electrical and magnetic properties of La0.7 Sr0.3 Mn1− x Fe x O3 (LSMFO), ( x = 0.00, 0.10, 0.15 and 0.20) nanoparticles (NPs) synthesized via reverse micelle (RM) technique have been studied in detail.