Dresden 2014 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Micro- and Nanostructured Magnetic Materials
MA 23.4: Vortrag
Mittwoch, 2. April 2014, 10:15–10:30, HSZ 403
Electric field effects on magnetic properties of transition-metal impurities on monolayer graphene — •Karla Türschmann1, Jesús Dorantes-Dávila2, and Gustavo M. Pastor1 — 1Institut für theoretische Physik, Universität Kassel, Kassel, Germany — 2Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
The manipulation of the magnetic properties of nanoscale materials with external electric fields is of considerable interest both as fundamental research subject and in view of developing nanoscale magnetoelectronic devices. Two-dimensional monolayer graphene (MLG) with its unique electronic properties is one of the most promising materials for future applications. Therefore, using MLG as a substrate for magnetic 3d transition metal (TM) nanoclusters should offer new opportunities in spintronics. This contribution presents the results of ab-initio density-functional theory of the magnetic properties of 3d TM adatoms and dimers on MLG as a function of applied external electric field E. Special attention is paid to field-induced changes of the magnetic order, the magnetic anisotropy energy and of the orientation of magnetization. For instance, in the case of Co dimers on MLG the electric field induces a transition from FM to AFM ordering as well as a change of the direction of the easy axis. Trends for other TMs are also discussed.