Spectroscopic analysis of NdMn2O5 by optical and transport mechanism

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2021-05, Vol.127 (5), Article 373
• Main Authors: Abbas, Hammad, Bukhari, Syed Hamad, Ahmad, Javed
• Format: Article
• Language: English
• Subjects: Absorption spectra; Applied physics; Characterization and Evaluation of Materials; Chemical synthesis; Condensed Matter Physics; Dielectric loss; Dielectric properties; Heat treatment; Machines; Manufacturing; Materials science; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Room temperature; Surfaces and Interfaces; Temperature dependence; Thin Films
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-021-04520-x

The polycrystalline NdMn 2 O 5 multiferroic was synthesized by wet chemistry method followed by heat treatment at 1000 °C. The structure was confirmed by X-ray diffraction (XRD) as orthorhombic with space group Pbam . The particle size and strain were calculated by Williamson-Hall method. Both infrared (IR) active and Raman active phonons have been observed using IR reflectivity and Raman spectroscopies. UV–visible absorption spectrum suggests that a possible optical band E g ∼ 1.27 eV has been determined using Kubelka–Munk function. Magnetic field (2 T) dependent magnetization at room temperature suggests the paramagnetic nature of present compound. In addition, frequency-dependent dielectric properties (20Hz–30 GHz) indicate variation in dielectric constant, dielectric loss, tangent loss, as well as AC conductivity, in two distinct dielectric responses which are in accord with Debye relaxation model.