1. Investigations of room temperature multiferroic and magneto-electric properties of (1-Φ) PZTFT-Φ CZFMO particulate composites.
- Author
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Bhoi, Krishnamayee, Pradhan, Dhiren K., Chandrakanta, K., Simhachalam, Narendra Babu, Singh, A. K., Vishwakarma, P. N., Kumar, A., Rack, Philip D., and Pradhan, Dillip K.
- Subjects
FIELD emission electron microscopy ,MAGNETICS ,MAGNETIC fields ,POLARIZATION (Electricity) ,ELECTRON microscope techniques ,ELECTRON field emission - Abstract
Multiferroic composites consisting of a single-phase multiferroic [0.6(PbZr
0.53 Ti0.47 O3 )-0.4(PbFe0.5 Ta0.5 )O3 ] as a matrix and a magnetostrictive phase (Co0.6 Zn0.4 Fe1.7 Mn0.3 O4 ) dispersed in the matrix are fabricated via hybrid synthesis technique. The structure and surface morphology studies using x-ray diffraction and field emission scanning electron microscopy techniques indicate the formation of 3-0 type particulate composites. Coexistence of soft-magnetic behavior and ferroelectric characteristics are confirmed for composites from magnetization vs magnetic field (M–H) and polarization vs electric field (P–E) measurements, respectively. Magneto-dielectric (MD) measurement shows significant changes in the dielectric properties with the application of a magnetic field, indicating the existence of strong MD behavior. The biquadratic nature of magneto-electric (ME) coupling is described by the Landau free energy equation arising from the strain transfer at the interfaces between the constituent phases. The direct magneto-electric voltage coefficient measurement also confirms very strong coupling between ferroelectricity and magnetism and supports the strain-mediated magneto-electric effect in composites. The Φ = 0.3 composite exhibits the maximum ME coefficient of 20.72 mV/cm Oe with MS = 24.62 emu/g, HC = 59.66 Oe, and piezoelectric coefficient value d33 = 19 pC/N. The strong magneto-electric effect along with low dielectric loss at room temperature in these composites suggests their suitability for multifunctional magneto-electric device applications such as magnetic sensors, etc. [ABSTRACT FROM AUTHOR]- Published
- 2023
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