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Title: | Structural, optical and dielectric properties of Cu1.5Mn1.5O4 spinel nanoparticles | Authors: | Hadded, Abir Massoudi, Jalel Dhahri, Essebti Khirouni, Kamel Costa, B. F. O. |
Issue Date: | 17-Nov-2020 | Publisher: | Royal Society of Chemistry | Project: | UID/04564/2020 Tunisian Ministry of Higher Education and Scientific Research within the framework of the Tunisian-Portuguese cooperation in the eld of scientic research and technology. QREN-Mais Centro Project No ICT_2009_02_012_1890 |
Serial title, monograph or event: | RSC Advances | Volume: | 10 | Issue: | 69 | Abstract: | In this study, a Cu1.5Mn1.5O4 spinel was successfully synthesized by a sol-gel method at 500 °C for 5 h and characterized by different techniques. X-ray diffraction (XRD), Fourier transformation infrared (FTIR) spectroscopy and Raman spectroscopic analyses confirmed the formation of a spinel cubic structure with the Fd3̄m space group. The SEM proves that the grain size of our compound is of the order of 48 nm. Crystallite sizes determined from three estimates are closer to the grain size obtained from the SEM, indicating the single domain nature of the sample. The optical properties of UV-visible spectroscopy for our sample showed that the gap value is equal to 3.82 eV, making our compound a good candidate for optoelectronic applications. For electrical properties, impedance spectroscopy was performed at a frequency range of 40 ≤ frequency ≤ 106 Hz. This suggested hoping conduction due to three theoretical models. The latter can be attributed to the correlated barrier hopping (CBH) model in region I, overlapping large polaron tunneling (OLPT) in region II and non-overlapping small polaron tunneling (NSPT) mechanism in region III. One dielectric relaxation is detected from the dielectric impedance and modulus, attributed to grain contributions. This behavior was confirmed by both Nyquist and Argand's plots of dielectric impedance at different measuring temperatures. | URI: | https://hdl.handle.net/10316/106686 | DOI: | 10.1039/d0ra08405k | Rights: | openAccess |
Appears in Collections: | I&D CFis - Artigos em Revistas Internacionais |
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Structural-optical-and-dielectric-properties-of-Cusub15subMnsub15subOsub4subspinel-nanoparticlesRSC-Advances.pdf | 1.96 MB | Adobe PDF | View/Open |
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