Publication: Point Defects in Rare-Earth Perovskite Systems BaMO3 (M = Ce, Pr and Tb) on Dielectric and Magnetic Behaviors
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Issued Date
2023
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application/pdf
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Scopus
Bibliographic Citation
Integrated Ferroelectrics. Vol 238, No.1 (2023), p.296-308
Suggested Citation
Pulphol P., Tariwong Y., Charoonsuk T., Maluangnont T., Vittayakorn W., Muanghua R., Bongkarn T., Kolodiazhny T., Vittayakorn N. Point Defects in Rare-Earth Perovskite Systems BaMO3 (M = Ce, Pr and Tb) on Dielectric and Magnetic Behaviors. Integrated Ferroelectrics. Vol 238, No.1 (2023), p.296-308. doi:10.1080/10584587.2023.2234577 Retrieved from: https://hdl.handle.net/20.500.14740/10442
Other Contributor(s)
Abstract
This study focused on the rare-earth hetero-valent substituted perovskite BaMO3 (M = Ce, Pr and Tb) which expected to show magnetoelectric response. In general, diamagnetic feature is presented in the 4f 0 BaCeO3 system down to 2 K which is chosen as a reference in the study while BaPrO3 (4f 1) and BaTbO3 (4f 7) display antiferromagnetic phase transition at TN = 11.7 and 33.2 K, respectively, measured by MPMS magnetometer. At high oxygen partial pressure and donor ion-substitution (Nb5+), the BaMO3 systems demonstrate a similar defect chemistry to titanate perovskite which compensated by Ba-vacancy. Dielectric relaxation is detected for the doublet (BaPrO3 and BaTbO3) at the antiferromagnetic phase transition region. In order to examine the magnetoelectric response, the 8 Tesla of magnetic field is applied to the samples during the dielectric measurement. BaTbO3 shows a modest magnetoelectric response around 0.2% at the antiferromagnetic phase transition while that of BaPrO3 is silent. The activation energies derived from Arrhenius equation are reported to be in the range of 0.2 − 0.6 eV. © 2023 Taylor & Francis Group, LLC.