Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 1: Joint Symposium "Tailoring Magnetism in L10-ordered Nanostructures: Perspectives for Magnetic Recording beyond 1 Tb/in2" (SYTM)
MA 1.3: Hauptvortrag
Montag, 26. März 2012, 10:30–11:00, H 0105
Electric field control of magnetic exchange coupling in FePt / Fe-O thin fims — •Karin Leistner — IFW Dresden, 01171 Dresden, Germany
Electric control of magnetism is a vision which drives intense research on magnetic semiconductors and multiferroics. Recently, also ultrathin metallic films were reported to show magnetoelectric effects at room temperature. Here we demonstrate much stronger effects by exploiting phase changes in a naturally grown oxide layer exchange coupled to an underlying ferromagnet. For the exemplarily studied FePt/iron oxide composite, a large and reversible change of magnetic moment and anisotropy is obtained. As the principle can be transferred to various metal/oxide combinations, this versatile approach represents a key step towards multifunctional materials, applicable in magnetic data storage and nanoactuators.