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Home > Archives > Volume 20, No 5 (2022) > Article

DOI:

Optical and Magnetic properties of chromium doped Nd0.5Sr0.5MnO3 system

Ashok Kumar Kusuma1,2, Katrapally Vijaya Kumar1*, A. T. Raghavender3

Abstract

Chromium doped Nd0.5Sr0.5Mn1-xCrxO3 (x= 0.0, 0.1, 0.2, 0.3, 0.4) system were synthesized by sol-gel method. The structural, optical, and magnetic properties were reported using XRD, XPS, UV-Vis Spectroscopy, Raman spectroscopy and room temperature VSM. The XRD analysis for all the samples revealed the formation of single-phase structure without any impurities. XPS analysis revealed the presence of the composition Nd0.5Sr0.5Mn1-xCrxO3 (x= 0.0, 0.1, 0.2, 0.3, 0.4) and dual oxidation states of Mn3+ and Mn4+. From UV-Vis spectra, energy bandgaps were calculated and found in the range 0.22-0.47eV, which could be attributed due to the electronic transition from up-spin of Mn3+ ion and down-spin of an adjacent Mn4+ ion. The characteristic peaks in Raman spectra was observed in the frequency range 200-1000 cm-1, at different measurement temperatures. The Raman spectra exhibited an additional high frequency mode attributed to the local vibration of oxygen surrounding substituent ion. It was observed that the frequency and intensity of Raman spectra were

Keywords

CMR materials, XRD, XPS, UV-Vis spectroscopy, Raman spectroscopy, Magnetic Properties

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