Electronic structure, magnetic and electrical properties of multiferroic PbFe1/2Ta1/2O3 |
| |
| Authors: | Chandrahas Bharti Alo DuttaSantiranjan Shannigrahi T.P. Sinha |
| |
| Affiliation: | a Department of Physics, Bose Institute, 93/1 Acharya Prafulla Chandra Road, Kolkata 700009, India
b Institute of Materials Research and Engineering (IMRE), 3 Research Link, Singapore 117602, Singapore |
| |
| Abstract: | Structural analysis of the synthesized lead iron tantalate, PbFe1/2Ta1/2O3 (PFT) is performed by the refinement of the X-ray diffraction data at room temperature using the GSAS code. Energy dispersive X-ray spectrometry analysis is done to find out the chemical composition. The electronic structure of PFT is calculated by the first principles full potential linearized augmented plane wave method. The spin polarized density of states shows the insulating nature. The magnetic moment of 4.3 μB per Fe ion is obtained from the electronic structure calculation using the GGA+U method and compared with the available experimental data. The electronic structure of the PFT is verified by X-ray photoemission spectroscopy. The dielectric spectroscopy is applied to investigate the electrical properties of PFT in the frequency range from 100 Hz to 1 MHz and in the temperature range from 183 to 253 K. The frequency dependent electrical data are analyzed by conductivity formalism. The relaxation mechanism is explained using the Cole-Cole approach. |
| |
| Keywords: | Dielectric response Dielectric loss Magnetic moment Density functional theory Multiferroic property |
| 本文献已被 ScienceDirect 等数据库收录！ |
