Studies of Optical, Dielectric, and Magnetic Behavior of Strontium-Doped GdMnO3.
- Resource Type
- Article
- Authors
- Priyadarshinee, Supriya; Pati, Jayashree; Mahapatra, Ranjita; Mohanty, Pragyan; Mohapatra, Jyoshnarani; Mishra, D. K.
- Source
- Journal of Superconductivity & Novel Magnetism. Jan2024, Vol. 37 Issue 1, p139-156. 18p.
- Subject
- *DIELECTRICS
*DIELECTRIC relaxation
*PERMITTIVITY
*DIELECTRIC loss
*PHASE transitions
*DOPING agents (Chemistry)
- Language
- ISSN
- 1557-1939
Gd0.7Sr0.3MnO3 and Gd0.67Sr0.33MnO3 prepared by solid-state reaction route at 950 °C exhibit orthorhombic structure with pbnm space group. Dielectric relaxation behavior and a phase transition expecting metal-to-insulator transition have been observed from the temperature dependence dielectric parameters of Gd0.7Sr0.3MnO3 and Gd0.67Sr0.33MnO3, respectively. Low values of dielectric constant and dielectric loss are observed at higher frequency range in both samples which make them suitable for device functioning applications. The impedance and modulus studies confirm the presence of non-Debye type of relaxation mechanism in both samples. Mixed phase of paramagnetism and ferromagnetism has been observed in both samples at room temperature. The increase in magnetization has been noticed with increase in doping concentration of strontium which is due to the increased vacancies at the Mn4+ sites with increase in doping concentration. The coercivity value increases with increase in doping concentration of strontium which is suitable for applications in electric and hybrid motors and also in aerospace industries. The studies clearly confirm the presence of both dielectric and ferromagnetic behaviors at room temperature. [ABSTRACT FROM AUTHOR]