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Study Of Multiferroic Properties Of Ferroelectric- Ferromagnetic Heterostructures Bzt-Bct/Lsmo, Md Abdullah-Al Mamun
Study Of Multiferroic Properties Of Ferroelectric- Ferromagnetic Heterostructures Bzt-Bct/Lsmo, Md Abdullah-Al Mamun
MSU Graduate Theses
Currently, there has been a flurry of research focused on multiferroic materials due to their potential applications. 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. In this thesis, multiferroic properties of ferroelectric-ferromagnetic heterostructures consist of Pb-free perovskite oxides 0.5Ba(Zr0.2Ti0.8)O3-0.5 (Ba0.7 Ca0.3)TiO3 (BZT-BCT) and La0.7Sr0.3MnO3 (LSMO) have been studied. The heterostructures BZT-BCT/LSMO were …
Experimental And Theoretical Analyses Of The Structural, Electronic And Magnetic Properties Of Novel Inverted Core-Shell A-Cr2o3@A-Mxcr2-Xo3-Y (M=Co, Ni, Mn, Fe) Nanoparticles, Mohammad Delower Hossain
Experimental And Theoretical Analyses Of The Structural, Electronic And Magnetic Properties Of Novel Inverted Core-Shell A-Cr2o3@A-Mxcr2-Xo3-Y (M=Co, Ni, Mn, Fe) Nanoparticles, Mohammad Delower Hossain
MSU Graduate Theses
I used hydrothermal nano-phase epitaxy technique to synthesize well-ordered a-Cr2O3@a-MxCr2-xO3 (M = Co, Ni, Mn, Fe) inverted core-shell nanoparticles (NPs). This resulted in the formation of novel a-MxCr2-xO3 shells having ferromagnetic/ferrimagnetic (FM/FiM) spin ordering and an antiferromagnetic (AFM) a-Cr2O3 core structure. The combined results from Xray diffraction (XRD) and high resolution transmission electron microscoy (HRTEM) provide evidence of the presence of the corundum phase both in the shell and in the core regions. HRTEM results also show a sharp interface exhibiting epitaxial atomic registry of shell atoms over highly ordered core atoms whereas TEM-Energy dispersive spectroscopy analyses show that the …