Coexistence of magnetic and ferroelectric properties in Y0.1Co1.9MnO4

The magnetic, conductivity, and dielectric properties have been investigated in single-phase polycrystalline Y_0.1Co_1.9MnO₄. The temperature-dependent magnetisation reveals the ferromagnetic transition in sample at a low temperature (~186 K). Magnetisation as a function of field H (M-H loop) indicated the weak ferromagnetism of the sample at room temperature. The constant epsilon and dielectric loss tgδ measurements represent a ferroelectric phase transition at a higher temperature (~650 K), while the conductivity shows an insulator-metallic transition. The ferroelectric hysterisis loops and capacitance-voltage measurements confirm the ferroelectric nature of the sample at room temperature. The observed ferromagnetism and ferroelectric nature in this material suggests a potential multiferroic application.