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DF: Fachverband Dielektrische Festkörper

DF 11: Poster

DF 11.19: Poster

Mittwoch, 9. März 2016, 18:00–20:00, Poster E

New multiferroic composite consisting of barium calcium zirconate titanate with large magnetoelectricty — •Muhammad Naveed-Ul-Haq¹, Vladimir Shvartsman¹, Soma Salamon², Heiko Wende², and Doru Lupascu¹ — ¹Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstraße 15, 45141 Essen, Germany. — ²Faculty of Physics and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Lotharstraße 1, 47057 Duisburg, Germany.

The lead-free composite multiferroics are the focus of current day research. The composites consist of a piezoelectric/ferroelectric part and a magnetostrictive part and the product property of the composites is utilized for the extraction of magnetoelectricity out of these composites. There are several composites in which barium titanate or its derivatives were used as the piezoelectric part. However, due to its excellent piezoelectric properties, the composition 50Ba(Zr, Ti)O₃ - 50(Ba, Ca)TiO₃ commonly known as BZT-BCT, is an excellent candidate for piezoelectric properties as it lies at the morphotropic phase boundary between orthorhombic and tetragonal polymorphic phases. BZT-BCT has an excellent room temperature piezoelectric constant, d₃₃ , of 600 pC/N. As a magnetostrictive phase we used cobalt ferrite due to its high value of magnetostriction. The composite so formed gives a value of converse magnetoelectric constant 6 ps/m which is excellent for piezoelectric-magnetostrictive composites.