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Robust isothermal electric switching of interface magnetization: A route to voltage-controlled spintronics

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      Abstract

      Roughness-insensitive and electrically controllable magnetization at the (0001) surface of antiferromagnetic chromia is observed using magnetometry and spin-resolved photoemission measurements and explained by the interplay of surface termination and magnetic ordering. Further, this surface in placed in proximity with a ferromagnetic Co/Pd multilayer film. Exchange coupling across the interface between chromia and Co/Pd induces an electrically controllable exchange bias in the Co/Pd film, which enables a reversible isothermal (at room temperature) shift of the global magnetic hysteresis loop of the Co/Pd film along the magnetic field axis between negative and positive values. These results reveal the potential of magnetoelectric chromia for spintronic applications requiring non-volatile electric control of magnetization.

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      Efficient iterative schemes forab initiototal-energy calculations using a plane-wave basis set

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        From ultrasoft pseudopotentials to the projector augmented-wave method

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          Multiferroic and magnetoelectric materials.

          A ferroelectric crystal exhibits a stable and switchable electrical polarization that is manifested in the form of cooperative atomic displacements. A ferromagnetic crystal exhibits a stable and switchable magnetization that arises through the quantum mechanical phenomenon of exchange. There are very few 'multiferroic' materials that exhibit both of these properties, but the 'magnetoelectric' coupling of magnetic and electrical properties is a more general and widespread phenomenon. Although work in this area can be traced back to pioneering research in the 1950s and 1960s, there has been a recent resurgence of interest driven by long-term technological aspirations.
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            Author and article information

            Journal
            21 April 2010
            1004.3763 10.1038/nmat2785

            http://arxiv.org/licenses/nonexclusive-distrib/1.0/

            Custom metadata
            Nature Materials 9, 579--585 (2010)
            Single PDF file: 27 pages, 6 figures; version of 12/30/09; submitted to Nature Materials
            cond-mat.mtrl-sci

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