Direct Observation of Capacitor Switching Using Planar Electrodes

Nina Balke; Martin Gajek; Alexander K. TagantsevLane W. MartinYing-Hao ChuRamamoorthy RameshSergei V. Kalinin

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Direct Observation of Capacitor Switching Using Planar Electrodes

机译：Direct Observation of Capacitor Switching Using Planar Electrodes

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Ferroelectric polarization switching in epitaxial (110) BiFeO_3 films is studied using piezoresponse force microscopy of a model in-plane capacitor structure. The electrode orientation is chosen such that only two active domain variants exist. Studies of the kinetics of domain evolution allows clear visualization of nucleation sites, as well as forward and lateral growth stages of domain formation. It is found that the location of the reverse-domain nucleation is correlated with the direction of switching in a way that the polarization in the domains nucleated at an electrode is always directed away from it. The role of interface charge injection and surface screening charge on switching mechanisms is explored, and the nucleation is shown to be controllable by the bias history of the sample. Finally, the manipulation of domain nucleation through domain structure engineering is illustrated. These studies pave the way for the engineering and design of the ferroelectric device structures through control of individual steps of the switching process.

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《Advanced functional materials》 |2010年第20期|3466-3475|共10页
作者
Nina Balke; Martin Gajek; Alexander K. TagantsevLane W. MartinYing-Hao ChuRamamoorthy RameshSergei V. Kalinin;
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Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge, TN, 37831, USA;

Department of Physics University of California Berkeley, Berkeley, CA, 94720, USA;

Ceramics Laboratory Ecole Polytechnique Federale de Lausanne 1015 Lausanne, SwitzerlandDepartment of Materials Science and Engineering University of Illinois Urbana-Champaign, Urbana, IL 61801, USADepartment of Materials Science and Engineering National Chiao Tung University Hsinchu 30010, Taiwan;

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中图分类无线电电子学、电信技术;
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Direct Observation of Capacitor Switching Using Planar Electrodes

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