Probing the effect of Zn2+ on the local structure, dielectric and magnetic properties of La2CuMnO6 by solid state synthesis

The comparable ionic-radius cation substitution provides a route to investigate the origin of the physical properties of ceramics on the local structure and electronic charge state background. In analogy to our previous work [19] of La2CuMnO6 (LCM) prepared via solid-state route, here we are reporti...

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Bibliographic Details
Published in:Journal of alloys and compounds 2023-03, Vol.936, p.168241, Article 168241
Main Authors: Singh, Digvijay Narayan, Shamim, Md.K., Panchal, G., Choudhary, R.J., Yadav, A.K., Jha, S.N., Bhattacharyya, D., Molak, A., Mahato, Dev K.
Format: Article
Language:English
Subjects:
A. Double perovskite ceramics
B. Solid state reactions
C. Magnetic properties
D. Electron-phonon interaction
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Summary:The comparable ionic-radius cation substitution provides a route to investigate the origin of the physical properties of ceramics on the local structure and electronic charge state background. In analogy to our previous work [19] of La2CuMnO6 (LCM) prepared via solid-state route, here we are reporting the effect of Zn substitution at the Cu site of LCM. The detailed structural analysis confirmed the Jahn-Teller (JT) distortion in LCM and Zn2+ substituted LCM (i.e., LCZM) ceramics. Raman analysis further confirmed the JT distortion in these oxides. O K-edge and Mn K-edge XANES spectra confirmed the mixed hybridization states for Mn. A frequency-dependent relaxor state was observed in the dielectric study of LCM and LCZM. The dielectric responses of these systems are prominently driven by electron-phonon coupling. Their magnetic studies showed positive-Curie temperature (TC) and non-zero coercivity, indicating the ceramics' canted-antiferromagnetic nature. •Structural, vibrational, spectroscopy, dielectric, and magnetic studies of novel ceramic La2Cu0.5Zn0.5MnO6 was carried out.•An investigation of disordering parameters revealed steric, orbital, and Jahn-Teller distortion in La2Cu1-xZnxMnO6 ceramics.•O K-edge, Mn K-edge analysis was carried out using SXAS and XNES spectroscopy.•Below room temperature, frequency-dependent relaxor characteristic was observed and studied by C-W law.•DC-magnetic behavior of the samples exhibited canted-antiferromagnetic nature.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2022.168241