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DPG

Berlin 2012 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 2: Multiferroics I (jointly with MA, DS, KR, TT)

DF 2.7: Talk

Monday, March 26, 2012, 11:30–11:45, EB 301

magnetoelectric effects in the cubic ferrimagnet Cu2OSeO3 — •Maria Eleni Belesi1,2, Mohamed Abid1, Helmuth Berger1, and Jean-Philippe Ansermet11Institute of Condensed Matter Physics, EPFL, Station 3, CH-1015 Lausanne, Switzerland — 2Leibniz Institute for Solid State and Materials Research, Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany

We present magnetic and dielectric measurements in single crystals of the cubic magnetoelectric compound Cu2OSeO3. The magnetic measurements show a transition to a ferrimagnetic state at 60 K. This state shows a finite magnetocapacitance which is temperature dependent and varies significantly upon changing the direction of the magnetic field with respect to the crystallographic axes. The magnetocapacitance is also shown to vary with the relative orientation of the magnetic and electric fields. In addition, we found that the magnetically ordered state shows a magnetic field induced electric polarization, whose temperature dependence and anisotropic properties will be discussed.

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