Secrets behind high temperature superconductors revealed
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Scientists from Queen Mary, University of London and the University of Fribourg have found evidence that magnetism is involved in the mechanism behind high temperature superconductivity. Writing in Nature Materials , Dr Alan Drew from Queen Mary's Department of Physics and his colleagues at the University of Fribourg report on the investigation of a new high temperature superconductor, the so-called oxypnictides. They found that these exhibit some striking similarities with the previously known copper-oxide high temperature superconductors - in both cases superconductivity emerges from a magnetic state. Their results go some way to explaining the mechanisms behind high temperature superconductors.
Dr Drew said "Last year, a new class of high-temperature superconductor was discovered that has a completely different make-up to the ones previously known - containing layers of Arsenic and Iron instead of layers of Copper and Oxygen. Our hope is that by studying them both together, we may be able to resolve the underlying physics behind both types of superconductor and design new superconducting materials, which may eventually lead to even higher temperature superconductors."
Professor Bernhard, of the University of Fribourg, added: "Despite the mysteries of high-temperature superconductivity, their applications are wide-ranging. One exciting applications is using superconducting wire to provide lossless power transmission from power stations to cities. Superconducting wire can hold a much higher current density than existing copper wire and is lossless and therefore energy saving."
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