Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 15, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3391667
Keywords
bismuth compounds; cobalt; dielectric thin films; doping; electric domains; magnetic domains; multiferroics; scanning probe microscopy; surface potential
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Funding
- Korea government (MEST) [2010-00001198, 2009-0073869]
- National Research Foundation of Korea [2009-0073869] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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The spatial coexistence of magnetic and ferroelectric domains in multiferroic BiFe0.96Co0.04O3 film is confirmed by multimode scanning probe microscopy. The applied bias dependence of the surface potential in BiFe0.96Co0.04O3 indicates that surface potential is determined by the interplay of polarization and surface charges. It is also shown that multiferroic BiFe0.96Co0.04O3 can more easily trap surface charges than the well-known ferroelectric PbZr0.53Ti0.47O3. The time evolution of surface potential exhibits an exponential decay, which is closely related to the observed spread of surface charges. The study on BiFe0.96Co0.04O3 unveils the origin and evolution behavior of the surface potential in BiFeO3-based multiferroic films.
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