Regensburg 2007 – wissenschaftliches Programm
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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