Thesis Defense: Md Abdullah-Al Mamun, Physics, Astronomy & Materials Science

Md Abdullah-Al Mamun (Mamun) will present his thesis defense on the topic: Study of multiferroic properties of ferroelectric-ferromagnetic heterostructures BZT-BCT/LSMO on LAO and Pt substrates grown by pulsed laser deposition. 

Lead (Pb)-based ferroelectric and multiferroic materials (PZT, PMN-PT, PZN-PT etc.) have been widely used for sensors, actuators, and electro-mechanical applications due to their excellent dielectric and piezoelectric properties. However, these materials are facing global restriction due to the toxicity of Pb as they contain more than 60% of Pb by weight. In this thesis, multiferroic properties of ferroelectric-ferromagnetic heterostructures consist of Pb-free perovskite oxides 0.5Ba(Zr0.2Ti0.8)O3-0.5(Ba0.7Ca0.3)TiO3(BZT-BCT) and La0.7Sr0.3MnO3(LSMO) have been studied. The heterostructures BZT-BCT/LSMO were fabricated on LaAlO3 (LAO) and Pt substrates by pulsed laser deposition.