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JANUARY 2019       TAP TIMES          -8-



                  New circuits (from 6)




        tive charges of atoms are offset, creating
        electric dipoles that align throughout the
        material and create a permanent electric
        moment.

                                                                  Berkeley Lab operates under the U.S. Dept. of Energy.
        Magnetic and ferroelectric                               (Berkeley Lab photo)
        MESO is based on a multiferroic material                The key breakthrough came with the rapid
        consisting of bismuth, iron and oxygen                  development of topological materials with
        (BiFeO3) that is both magnetic and ferro-               spin-orbit effect, which allow for the state
        electric.                                               of the multiferroic to be read out effi cient-
                                                                ly.
        Its key advantage, Ramesh said, is that
        these two states, magnetic and ferroelec-
        tric, are linked or coupled, so that chang-             Alters electron spins
        ing one affects the other. By manipulating              In MESO devices, an electric fi eld alters or
        the electric fi eld, you can change the mag-            fl ips the dipole electric fi eld throughout the
        netic state, which is critical to MESO.                 material, which alters or fl ips the electron
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