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Indentation induced local polarization reversal in La doped BiFeO3 ceramics

Alexander Abramov; Denis Alikin; Vladimir Yuzhakov; Alexander Nikitin; Dmitry Karpinsky; Vladimir Shur; Andrei Kholkin


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    <dct:title>Indentation induced local polarization reversal in La doped BiFeO3 ceramics</dct:title>
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    <dcat:keyword>bismuth ferrite, mechanical-induced domain switching, indentation</dcat:keyword>
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    <dct:description>&lt;p&gt;Stress-induced local polarization reversal was studied in La doped&lt;br&gt; BiFeO3 ceramics under the action of Berkovich-type prism indentation.&lt;br&gt; Piezoresponse force microscopy was used for detailed study of&lt;br&gt; domain structure before and after local polarization reversal. Two&lt;br&gt; mechanisms of domain formation under the action of the mechanical&lt;br&gt; loading were revealed: (1) direct stress-induced and (2) stress&lt;br&gt; mediated by grain clamping. Critical stress value for local polarization&lt;br&gt; reversal was extracted from the dependence of the switched&lt;br&gt; area on the applied loading force&lt;/p&gt;</dct:description>
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