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MA: Fachverband Magnetismus

MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)

MA 15.128: Poster

Dienstag, 27. März 2007, 15:00–19:00, Poster A

The multiferroic phases of (Eu:Y)MnO₃ — •Florian Schrettle¹, Joachim Hemberger¹, Andrei Pimenov¹, Peter Lunkenheimer¹, Vseva Ivanov², Alexander Mukhin², Anatoli Balbashov³, and Alois Loidl¹ — ¹Experimentalphysik V, Center for Electronic Correlations and Magnetism, Institut für Physik, Universität Augsburg, D-86135 Augsburg, Germany — ²General Physics Institute of the Russian Academy of Sciences, 38 Vavilov Street, 119991 Moscow, Russia — ³Moscow Power Engineering Institute, 14 Krasnokasarmennaja Street, 111250 Moscow, Russia

In recent years multiferroic magnetoelectrics attracted an increasing scientific and technological interest. In this rare class of compounds ferroelectricity (or at least a weak ferroelectric component) and (ferro-)magnetism coexist and both order-parameters are strongly coupled. Prominent examples for such type of materials are the heavy rare earth manganites like TbMnO₃, where the partial frustration in the spin-sector leads to spiral magnetic structures inducing finite ferroelectric polarization. The system (Eu:Y)MnO₃ offers the possibility to continuously control the orthorhombic distortion of the orbitally ordered perovskite structure and thus to tune the corresponding multiferroic phases without the additional influence of a magnetic rare earth moment. In the concentration range near x=0.2 for these class of materials the unique case of spontaneously coexisting ferroelectric and ferromagnetic components is realized.

[1] J. Hemberger et al., Phys. Rev. B, in press, cond-mat/0603258