Regensburg 2013 – wissenschaftliches Programm
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KR: Fachgruppe Kristallographie
KR 2: Multiferroics 2 (MA jointly with DF, DS, KR, TT)
KR 2.1: Vortrag
Montag, 11. März 2013, 15:00–15:15, H3
Magnetization control in thin two-phase multiferroic structures via external electric fields — •Alexander Sukhov1, Paul P. Horley2, Chenglong Jia3, and Jamal Berakdar1 — 1Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, D-06120 Halle/Saale, Germany — 2Centro de Investigation en Materiales Avanzados, S.C. (CIMAV), 31109 Chihuahua, Mexico — 3Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, China
We present a theoretical study of the coupled magnetization and polarization dynamics in a thin multiferroic junction related to a BaTiO3 (rhombohedral phase) layer in contact with Fe-layer. The dynamical properties are discussed in the context of different interfacial magnetoelectric coupling mechanisms. For the magnetoelectric coupling induced by the screening of the spin-polarized electrons in Fe we investigate the minimum strength of the coupling constant which is required for the full switching of the magnetization [1]. In the case of a strain-induced magnetoelectric interaction we show an electric field-induced magnetic switching in the plane perpendicular to the magneto-crystalline easy axis while the total magnetization remains stable [2]. In addition, the response of the multiferroic structure to magnetic radio-frequency fields by means of ferromagnetic resonance and dependent on the applied electric field is studied. [1] P.P. Horley, A. Sukhov, C.-L. Jia, E. Martinez, J. Berakdar, Phys. Rev. B 85, 054401 (2012). [2] C.-L. Jia, A. Sukhov, P.P. Horley, J. Berakdar, Europhys. Lett. 99, 17004 (2012).