Magnetoelectric composites: Synthesis, optimization and novel magnetoelectric characterizations under mechanical load conditions

Muhammad Naveed-Ul-Haq, University of Duisburg-Essen, Essen, Germany
Shahab Ahmadshah Nazrabi, University of Duisburg-Essen, Essen, Germany
Vladimir Shvartsman, University of Duisburg-Essen, Essen, Germany
Soma Salamon, University of Duisburg-Essen, Duisburg, Germany
Heiko Wende, University of Duisburg-Essen, Duisburg, Germany
Doru Lupascu, University of Duisburg-Essen, Essen, Germany

Materials which combine at least two of the ferroic orderings among ferroelectricity, ferromagnetism and ferroelasticity are known as multiferroics. The cross-coupling between electrical and magnetic orders is termed magnetoelectric coupling. Composite multiferroics usually contain barium titanate or its derivatives which act as piezoelectric/ferroelectric constituent and magnetostrictive constituents such as cobalt ferrite or nickel ferrite. These two phases can be combined with various connectivity schemes such as 0-3, 2-2 or 1-3 etc.

Here, we report on a comprehensive study of barium titanate-cobalt ferrite 0-3 and a new material barium zirconate titanate-cobalt ferrite 3-3 composites, which include synthesis and magnetoelectric characterizations. Since the magnetoelectric effect is a consequence of interactions between mechanical, electrical and magnetic degrees of freedom, it is of great relevance to study these properties simultaneously. Therefore, we also report on the design and construction of an experimental setup that is capable of measurement of magnetoelectric coefficient under simultaneous application of a mechanical load and dc magnetic field.

Hence, our research deals with two main aspects of materials: the synthesis of new materials with enhanced magnetoelectric properties and the characterization of these materials with the help of a new experimental setup. Those aspects are intriguing to the materials science community due to the importance of suchlike materials in the current electronic industry as components of sensors, memory devices and energy harvesters.

« back