Electrical, Dielectric, and Magnetic Characteristics of (BiBa)(FeMn2)O8

A new compound of chemical formula (BiBa)(FeMn2)O8 is prepared by a solid-state reaction method. X-ray structural studies confirm orthorhombic unit cell of the compound. Room-temperature magnetic data display ferromagnetic hysteresis loop with high value of effective magnetic moments. The dependence of dielectric constant, loss tangent, impedance, and the conductivity at different frequencies (1 kHz-1 MHz) are measured using LCR meter on rise of temperature from room temperature to 500 degrees C. The dielectric constant increases on rise of temperature due to Maxell-Wagner polarization, and the loss tangent displays similar behavior. A low value of loss tangent is obtained at higher frequencies, which paves the way for the application of the compound in high-frequency devices. The real impedance of the compound decreases indicating NTCR (negative temperature coefficient of resistance) behavior, and the imaginary impedance displays relaxor behavior. The Nyquist plot fits to a series combination of two RQC circuits ((RQC)(RQC)) and indicates the presence of non-Debye relaxation. The frequency variation of conductivity obeys Jonscher's power law and reveals different conduction mechanisms in grain and grain boundary regions.

Automated summary

A new compound was synthesized using a solid-state reaction method and its physical properties were investigated. The compound shows potential applications in high-frequency devices according to its structural and electrical characteristics.