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Current issue

ELEKTRO 6/2020 was released on June 6th 2020. Its digital version will be available on June 24th 2020.

Topic: Electrical machines, drives and power electronics, electromobility

Main Article
New traction power supply technology 25 kV/50 Hz (part 1)

SVĚTLO (Light) 2/2020 was released on March 6th 2020. Its digital version will be available immediately.

Market, business, enterprise
BOOBA in new showroom, which surpassed all expectations
Discourse with Technology of Capital city Prague chairman of management

Day light
Diagram of overshadow for 21st march
Modern methods of gaining dates for processing lighting technology assessment

New record temperature for a superconductor

21. 8. 2015 | Ars Technica; Johannes Gutenberg University | www.arstechnica.com

Superconductivity was first seen in metals cooled down to close to absolute zero. But after exhausting every metal on the periodic table, the critical temperature at which the metal transitions to superconductivity never budged far from those extremely low temperatures.

That changed dramatically with the development of cuprate superconductors, copper-containing ceramics that could superconduct in liquid nitrogen - still very cold (138K or - 135°C), but relatively easy to achieve. But progress has stalled, in part because we don't have a solid theory to explain superconductivity in these materials.

New temperatures in superconductor

Now, taking advantage of the fact that we do understand what's going on in superconducting metals, a German research team has reached a new record critical temperature: 203K, or -70°C, a temperature that is sometimes seen in polar regions. The material they used, however, isn't a metal that appears on the periodic table. In fact, they're not even positive they know what the material is, just that it forms from hydrogen sulfide at extreme pressures.

Read more at Ars Technica

Image Credit: Brookhaven National Lab

-jk-