When 10:30 AM - 11:30 AM Dec 11, 2015
Where 1571 G.G. Brown
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Magnetoelectric and Magnetotransport Behavior of Solution Grown Metal-Oxide Materials


Menka Jain
Institute of Materials Science and Department of Physics, University of Connecticut

Solution synthesis methods allow low-cost fabrication of single phase bulk, thin films, and biphasic nanocomposites of many functional and multifunctional materials. Magnetoelectric multiferroic (ME MF) materials, which exhibit magnetic and electric orders, are of great interest for memory, energy harvesting, and sensing applications. Such ME materials can be broadly divided into two categories: (i) single phase MEs and (ii) biphasic MEs. In biphasic ME nanocomposites, concentration and connectivity of the two phases play an important role in defining their magnetic and electrical properties. In case of biphasic ME nanocomposite films, magnetic phase were incorporated in the piezoelectric matrix in order to observe the ME coupling that is mediated through mechanical strain at the interfaces between the two phases. The detailed ferroelectric and ME properties of 0-3 type nanocomposite thin films with CoFe2O4 phase dispersed in PbZr0.52Ti0.48O3 matrix will be presented. Among single phase MEs, materials like TbMnO3, with orthorhombically distorted perovskite (ABO3 type) structure, are doped at the A- and B-sites. The structural, magnetic, and in some case magnetocaloric studies of the pure and doped bulk TbMnO3 will be presented in details. In addition, the results on the magnetotransport behavior of the La0.67Sr0.33MnO3 films will be presented that show great enhancement in magnetic field sensitivity when prepared in nanocomposite form and thus could be promising for magnetic field sensing applications.

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