Electrocaloric effect in (1-x)(0.8Na&amp;lt;sub&amp;gt;1/2&amp;lt;/sub&amp;gt;Bi&amp;lt;sub&amp;gt;1/2&amp;lt;/sub&amp;gt;TiO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;-0.2BaTiO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;)-xCaTiO&amp;lt;sub&amp;gt;3 &amp;lt;/sub&amp;gt;solid solutions at high fields.