engleski

Investigation of magnetoelectric behaviour of novel possibly multiferroic materials

Magnetoelectric multiferroics are materials in which both the magnetic and electric orders appear, that becomes especially interesting if coupling between them is present and/or the orders are established simultaneously. Such materials are under intensive investigation since mechanisms of these effects are not fully understood, and the application of such materials in sensors, memory elements, photovoltaics, nano-electronics is expected. Here we present the installed upgrades of the experimental setups which make possible to apply the electric field and measure its influence on the magnetization using commercial magnetometer, and also to measure electric properties of the material in magnetic field. This allows to investigate the magnetoelectric effects together with their magnetic and electric states. Within the project we are studying two general classes of materials: mixed metal oxides (like CaCr2O4, CrNbO4, BiFeO3, birnessite and double perovskites) and metal-organic complexes (including 3D coordination polymers, layered structures of magnetic and polar components, coupled magnetic chains and 0D objects). Some novel magnetoelectric results will be shortly presented. In order to better understand behaviour of the synthesized compounds, including their ground magnetic and polar states, theoretical quantum calculations on the studied structures are undertaken. In this way, we complete the research cycle from synthesis and structure determination, to full magnetic and electric investigation and theoretical calculation. Doctoral student and postdoc are associated in the project. Installation research project “Multiferroic and magnetoelectric systems” (FerMaEl) is supported by the Croatian Science Foundation under the grant UIP-2014-09-8276. (http://www.phy.pmf.unizg.hr/~dpajic/FerMaEl/)

magnetic order, magnetoelectric effect, multiferroics, metalorganic complexes, metal oxides

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