Dresden 2014 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 8: Multiferroics I (Joint Session with MA, DS, KR, TT)
DF 8.8: Vortrag
Dienstag, 1. April 2014, 11:30–11:45, BEY 118
Room temperature magnetism and ferroelectricity in eps-Fe2O3 thin films — •I. Fina1, M. Gich2, A. Morelli1, F. Sánchez2, M. Alexe1, J. Fontcuberta2, and A. Roig2 — 1Max Planck Institute of Microstructure Physics D-06120 Hallle/Salle, Germany — 2Institut de Ciència de Materials de Barcelona ICMAB, Consejo Superior de Investigaciones Científicas CSIC, Campus UAB 08193 Bellaterra, Catalonia, Spain
The quest for magnetoelectric multiferroics is driven by the promise of a novel generation of devices combining the best characteristics of ferromagnetic and ferroelectric materials. These cherished applications require materials displaying a substantial magnetization and electric polarization which are coupled and coexist well above room temperature. These properties are not commonly fulfilled by single phase materials and firm candidates for the development of these technologies are still sought.
In this contribution, we will report on epitaxial eps-Fe2O3 thin films grown by Pulsed Laser Deposition on (111) SrTiO3 and present recent data on its structural, magnetic and dielectric characterization. The films are ferromagnetic and ferroelectric at room temperature and display magnetization and polarization values at remanence of about 50 emu/cm3 and 1 uC/cm2 with a long retention. A magnetocapacitive response has also been detected indicating that the films present coupling between both ferroic orders.