Study of Structural, Magnetic and Optical Properties of $$\hbox {BiFeO}_{3}{-}\hbox {PbTiO}_{3}$$ BiFeO 3 - PbTiO 3 Multiferroic Composites

• DOI: 10.1007/s13369-018-3543-1
• Publication Date: 2018-09-07T06:23:08Z
• Authors: Mohammad Shariq; Davinder Kaur; Vishal Singh Chandel; Praveen K. Jain; Sasi Florence; Mukul Sharma; Shahir Hussain
• Keywords: Bismuth ferrite; Tetragonal crystal system; Phase boundary; Néel temperature

The crystalline samples of lead titanate altered bismuth ferrite ( $$\hbox {BiFeO}_{3})_{1-{x}}(\hbox {PbTiO}_{3})_{{x}}$$ [ $$x= 0, 0.1, 0.2, 0.3, 0.4$$ and 0.5] have been synthesized by high-temperature solid-state reaction technique. The formation of the materials was affirmed through fundamental investigation utilizing X-ray diffraction which uncovers the presence of morphotropic phase boundary (MPB) in composite. XRD examination displays structural change from rhombohedral ( $$x=0.0$$ ) to tetragonal ( $$x=0.4$$ ). Estimated grain size along (104) peak was observed to be diminished with the increase in content of $$\hbox {PbTiO}_{3}$$ due to mixing of tetragonal phases. SEM and EDAX of sample were carried out for analysis of surface morphology and verification of chemical homogeneity, respectively. Study of M-H graph reveals antiferromagnetic nature of $$\hbox {BiFeO}_{3}$$ . Magnetic measurement of ( $$\hbox {BiFeO}_{3})_{1-{x}}(\hbox {PbTiO}_{3})_{{x}}$$ ceramics shows weak-induced ferromagnetism by substituent effects at temperature of 5 K. Low-temperature magnetic measurement under ZFC reveals an anomaly in tetragonal phase of MPB for composition $$x=0.2$$ and 0.3. With respect to $$\hbox {BiFeO}_{3}$$ , $$\hbox {BiFeO}_{3}{-}\hbox {PbTiO}_{3}$$ ceramics displays advancement in the electric polarization. Direct and indirect band gaps are modified with variation of $$\hbox {PbTiO}_{3}$$ in $$\hbox {BiFeO}_{3}{-}\hbox {PbTiO}_{3}$$ composites.