{"id":125382,"date":"2013-07-24T20:41:23","date_gmt":"2013-07-24T23:41:23","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/?p=125382"},"modified":"2013-09-06T18:58:09","modified_gmt":"2013-09-06T21:58:09","slug":"surprising-superconductors","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/surprising-superconductors\/","title":{"rendered":"Surprising superconductors"},"content":{"rendered":"<p>A promising new class of superconductor materials was described in an article published in May by the <em>Physical Review B<\/em>. Under normal conditions, the compound zirconium diboride (ZrB2) is not a superconductor. But doctoral candidate S\u00e9rgio Renosto, under the advisorship of materials engineer Jefferson Machado, of the University of S\u00e3o Paulo\u2019s Engineering School of Lorena (EEL-USP), discovered that ZrB2 becomes a superconductor that displays extraordinary properties when 0.4% of the zircon is replaced with vanadium atoms. This superconductivity appears at a temperature researchers consider \u201chigh,\u201d that is, at \u2212264.3C. What\u2019s most interesting, however, is that the theory that is currently the most accepted in the field fails to account for the energy values of the electrons in the material. \u201cThey are due to another mechanism, which has yet to be explained,\u201d says Machado. Another unusual property is the new material\u2019s upper critical magnetic field. The higher its value, the less material is needed to generate high magnetic fields. Its critical field is 16.5 Teslas, greater than the 10 Teslas for the superconductor niobium-titanium alloys used in the coils of magnetic resonance imagining (MRI) machines.<\/p>\n","protected":false},"excerpt":{"rendered":"Surprising superconductors","protected":false},"author":475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[168],"tags":[219,228],"coauthors":[785],"class_list":["post-125382","post","type-post","status-publish","format-standard","hentry","category-technoscience","tag-computation","tag-engineering"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/125382","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=125382"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/125382\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=125382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=125382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=125382"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=125382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}