Structural, morphological, optical, dielectric and magnetic field sensing characteristics of Bi1-xKxMnO3 and BiMn1-yCoyO3 nanopowders: A comparative study

Publication date: 1 December 2019Source: Materials Letters, Volume 256Author(s): B. Revathi, L. Balakrishnan, N. Krishna ChandarAbstractComposites of BiMnO3 such as Bi1-xKxMnO3 and BiMn1-yCoyO3 (x = y = 0.05, 1.0, 1.5) based fiber optic magnetic field sensors were fabricated and sensitivity analysis was performed at room temperature. The properties of nanosized particles synthesized using hydrothermal method were studied using X-ray diffraction, scanning electron microscope, ultraviolet–visible spectrometer and Dielectric measurement. The results reveal the formation of nanocrystallite of size ∼ 50 nm with rice like morphology in the bandgap range between 1.2 eV and 1.5 eV. The 5% K doped BMO has better magnetic field sensitivity at a source wavelength of 693 nm and pristine BMO has better sensitivity at 772 nm.
Source: Materials Letters - Category: Materials Science Source Type: research