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Latest Superconductivity Stories

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2009-08-03 10:40:00

Hydrogen, the most common element in the universe, is normally an insulating gas, but at high pressures it may turn into a superconductor. Now, scientists at the Carnegie Institution in Washington D.C., US, have discovered a hydrogen-based compound that could be helpful in the search for metallic and superconducting forms of hydrogen. The results are reported in Physical Review Letters and highlighted in the August 3rd issue of APS's on-line journal Physics (physics.aps.org).Hydrogen is the...

2009-07-23 13:45:12

Reports about swimmers menaced by giant squids off San Diego raised the ire of marine biologist Brad Seibel who found the awesome monsters are really timid. And, afraid of the light. I want to spread the word that they aren't the aggressive man-eaters as they have been portrayed, said Seibel who has taken moonlight swims surrounded by a big gang of squids. For years Seibel, a biologist at the University of Rhode Island, had heard stories claiming that a Humboldt squid will devour a dog in...

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2009-07-13 07:45:00

Superconductivity appears to rely on very different mechanisms in two varieties of iron-based superconductors. The insight comes from research groups that are making bold statements about the correct description of superconductivity in iron-based compounds in two papers about to be published in journals of the American Physical Society.The 2008 discovery of high-temperature superconductivity in iron-based compounds has led to a flood of research in the past year. As the literature mounts on...

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2009-06-17 16:05:00

Superconductivity is a unique state in which electrons move freely inside a solid material. This complete lack of electrical resistance could translate to incredibly efficient electric power cables, as well as many other promising technologies.But there's a hitch. Most superconductors become that way only at very low temperatures, often near absolute zero (around -273 degrees Celsius or -460 degrees Fahrenheit). To chill a material enough so that its electrons become "unglued" from their...

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2009-06-17 14:40:00

Researchers at the National Institute of Standards and Technology (NIST) have discovered that a reduction in mechanical strain at the boundaries of crystal grains can significantly improve the performance of high-temperature superconductors (HTS). Their results* could lead to lower cost and significantly improved performance of superconductors in a wide variety of applications, such as power transmission, power grid reliability and advanced physics research.One of the main challenges in...

2009-06-10 09:07:29

University of Texas at Austin physicists have created a superconducting lead sheet only two atoms thick, the thinnest such metal layer ever created. Professor Ken Shih and colleagues said the achievement lays the groundwork for future superconductor technologies. To be able to control this material -- to shape it into new geometries -- and explore what happens is very exciting, Shih said. My hope is that this superconductive surface will enable one to build devices and study new properties of...

d5193b5e5f9fbe66e4866cd83870cb7c1
2009-06-08 13:00:00

A superconducting sheet of lead only two atoms thick, the thinnest superconducting metal layer ever created, has been developed by physicists at The University of Texas at Austin.Dr. Ken Shih and colleagues report the properties of their superconducting film in the June 5 issue of Science.Superconductors are unique because they can maintain an electrical current indefinitely with no power source. They are used in MRI machines, particle accelerators, quantum interference devices and other...

2009-06-03 16:22:45

U.S. scientists have determined certain squids can detect light through a symbiotic organ, not just through their eyes. University of Wisconsin-Madison researchers said the light-emitting organ some squids use in camouflaging themselves to avoid being seen by predators also detects light. That, the scientists said, is a finding that might lead to insights into the mechanisms of controlling and perceiving light. Professor Margaret McFall-Ngai, who led the study, said the light organ, which...

2009-05-28 11:25:05

A team of researchers at the University of Illinois has demonstrated that, counter to classical Newtonian mechanics, an entire collection of superconducting electrons in an ultrathin superconducting wire is able to "tunnel" as a pack from a state with a higher electrical current to one with a notably lower current, providing more evidence of the phenomenon of macroscopic quantum tunneling.Physics professors Alexey Bezryadin and Paul Goldbart led the team, with graduate student Mitrabhanu Sahu...

041c06c75f7bd3c78f808bf9ec38b7881
2009-05-16 09:45:00

Of the 92 naturally occurring elements, add another to the list of those that are superconductors.James S. Schilling, Ph.D., professor of physics in Arts & Sciences at Washington University in St. Louis, and Mathew Debessai "” his doctoral student at the time "” discovered that europium becomes superconducting at 1.8 K (-456 °F) and 80 GPa (790,000 atmospheres) of pressure, making it the 53rd known elemental superconductor and the 23rd at high pressure.Debessai, who...


Latest Superconductivity Reference Libraries

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2010-09-23 20:39:09

An electromagnet, a magnet whose magnetic field is produced by the flow of electric current, works until the electric current ceases. The magnetic field in a simple electromagnet is created by a wire passing through it with an electric current. The strength of the magnet depends on the amount of current. By making the wire into a coil the magnetic field is concentrated. A straight tube coil is a solenoid. A stronger magnetic field can be produced by putting a ferromagnetic material, such as...

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