Abstract

Holmium (Ho) substituted KBi0.95Ho0.05Fe2O5 polycrystalline having P2/c space group is synthesized using solid-state reaction route. The phase purity is characterized by x-ray diffraction measurement. The temperature-dependent dielectric permittivity (ε΄) and loss (tan δ) is analyzed over a wide temperature range (10 K to 300 K) in the presence of 1.3 T and 0 T magnetic field. The temperature-dependent dielectric permittivity and loss plots are shifting with the magnetic field. It indicates the presence of Magnetodielectric (MD) signature in KBi0.95Ho0.05Fe2O5 polycrystalline. Variation of magnetodielectric with magnetic field shows a butterfly-like MD loop, indicating MD coupling. The extracted maximum room temperature magnetodielectric coupling is found to be 0.2% in KBi0.95Ho0.05Fe2O5 sample. The magnetic field-dependent impedance measurement is carried out to address the extrinsic effects behind the MD coupling. These results made it a prominent candidate for multifunctional device applications and provided space to investigate further the microscopic origin behind it.

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