%0 Journal Article
%K Multiferroics
%K Nanotechnology
%K Photovoltaic
%K Ferroelectricity
%K Electrostatic potentials
%K Nanoscale
%K Photovoltaic effects
%K Scanning probes
%K Domain boundary
%K Conductive AFM
%K Current voltage
%K Domain structure
%K Electrode spacing
%K I-V measurements
%K Mesoscopics
%K Photovoltages
%K Polarization direction
%K Stripe domain
%A J Seidel
%A S.-Y Yang
%A E Alarcón-Lladó
%A Joel W Ager
%A Ramamoorthy Ramesh
%B Ferroelectrics
%D 2012
%G eng
%P 123-126
%R 10.1080/00150193.2012.678156
%T Nanoscale probing of high photovoltages at 109 domain walls
%V 433
%X We report the direct observation of nanoscale photovoltaic current-voltage properties associated with directional steps of the electrostatic potential at 109 domain walls in ferroelectric BiFeO 3 thin films with highly ordered ferroelectric stripe domains. The unidirectional photovoltaic effect along the net-in-plane polarization direction is shown to exhibit anomalies at the micro-and nanoscale due to local differences in mesoscopic domain structure. Very high initial photovoltages for small electrode spacings are observed using a conductive AFM tip as one of the electrodes in photovoltaic I-V measurements. © 2012 Taylor & Francis Group, LLC.