Featured Research

from universities, journals, and other organizations

Vortex pinning could lead to superconducting breakthroughs

Date:
February 13, 2013
Source:
DOE/Argonne National Laboratory
Summary:
New findings may represent a breakthrough in applications of superconductivity. Scientists discovered a way to efficiently stabilize tiny magnetic vortices that interfere with superconductivity -- a problem that has plagued scientists trying to engineer real-world applications for decades.

This graphic shows a strip of superconducting wire with a chain of vortices (red). The green areas show strong superconductivity. Superimposed are two curves showing the resistance of the strip depending on the magnetic field; as the magnetic field increases, the resistance first grows, then drops dramatically.
Credit: Image courtesy of DOE/Argonne National Laboratory

A team of researchers from Russia, Spain, Belgium, the U.K. and the U.S. Department of Energy's (DOE) Argonne National Laboratory announced findings last week that may represent a breakthrough in applications of superconductivity.

The team discovered a way to efficiently stabilize tiny magnetic vortices that interfere with superconductivity -- a problem that has plagued scientists trying to engineer real-world applications for decades. The discovery could remove one of the most significant roadblocks to advances in superconductor technology.

Superconductors are extremely useful materials, given that modern society involves moving a lot of electricity around. Each time we do it, whether it be along the cord from the outlet to your lamp or in the millions of miles of power lines strung across the country, we lose a little bit of electricity. That effect is due to resistance in the wires we currently use to transport electricity. Even a pretty good conductor, like copper wire, loses some electricity due to resistance.

But in an ideal superconductor, no electricity is ever lost. If you set up a loop of perfect superconducting wire and added some current, it would circle that loop forever. Superconductors are the secret behind MRI machines, Maglev trains and improved cell phone reception.

The problem is that superconductors have to be cooled to do their thing. Even the "high-temperature" superconductors already discovered have to be chilled to -280ฐ Fahrenheit. That creates a lot of engineering and logistical problems.

In the long run, scientists are hoping to develop superconducting materials that would operate closer to room temperature. That would be a major achievement -- though it is generally still thought to be a long way off.

In the meantime, there remain key problems of superconductivity that need to be solved even in the low-temperature environment.

One such major problem is posed by magnetic fields. When magnetic fields reach a certain strength, they cause a superconductor to lose its superconductivity. But there is a type of superconductor -- known as "Type II" -- which is better at surviving in relatively high magnetic fields. In these superconductors, magnetic fields create tiny whirlpools or "vortices." Superconducting current continues to travel around these vortices to a point, but eventually, as the magnetic field strengthens, the vortices begin to move about and interfere with the material's superconductivity, introducing resistance.

"These vortices dissipate the energy when moving under applied currents and bury all hopes for a technological revolution -- unless we find ways to efficiently pin them," said Argonne Distinguished Fellow Valerii Vinokur, who co-authored the study.

Scientists have spent a lot of time and effort over the past few decades trying to immobilize these vortices, but until now, the results have been mixed. They found ways to pin down the vortices, but these only worked in a restricted range of low temperatures and magnetic fields.


Story Source:

The above story is based on materials provided by DOE/Argonne National Laboratory. The original article was written by Louise Lerner. Note: Materials may be edited for content and length.


Journal Reference:

  1. R. C๓rdoba, T. I. Baturina, J. Ses้, A. Yu Mironov, J. M. De Teresa, M. R. Ibarra, D. A. Nasimov, A. K. Gutakovskii, A. V. Latyshev, I. Guillam๓n, H. Suderow, S. Vieira, M. R. Baklanov, J. J. Palacios, V. M. Vinokur. Magnetic field-induced dissipation-free state in superconducting nanostructures. Nature Communications, 2013; 4: 1437 DOI: 10.1038/ncomms2437

Cite This Page:

DOE/Argonne National Laboratory. "Vortex pinning could lead to superconducting breakthroughs." ScienceDaily. ScienceDaily, 13 February 2013. <www.sciencedaily.com/releases/2013/02/130213114715.htm>.
DOE/Argonne National Laboratory. (2013, February 13). Vortex pinning could lead to superconducting breakthroughs. ScienceDaily. Retrieved July 25, 2014 from www.sciencedaily.com/releases/2013/02/130213114715.htm
DOE/Argonne National Laboratory. "Vortex pinning could lead to superconducting breakthroughs." ScienceDaily. www.sciencedaily.com/releases/2013/02/130213114715.htm (accessed July 25, 2014).

Share This




More Matter & Energy News

Friday, July 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

TSA Administrator on Politics and Flight Bans

TSA Administrator on Politics and Flight Bans

AP (July 24, 2014) — TSA administrator, John Pistole's took part in the Aspen Security Forum 2014, where he answered questions on lifting of the ban on flights into Israel's Tel Aviv airport and whether politics played a role in lifting the ban. (July 24) Video provided by AP
Powered by NewsLook.com
Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) — Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Algonquin Power Goes Activist on Its Target Gas Natural

Algonquin Power Goes Activist on Its Target Gas Natural

TheStreet (July 23, 2014) — When The Deal's Amanda Levin exclusively reported that Gas Natural had been talking to potential suitors, the Ohio company responded with a flat denial, claiming its board had not talked to anyone about a possible sale. Lo and behold, Canadian utility Algonquin Power and Utilities not only had approached the company, but it did it three times. Its last offer was for $13 per share as Gas Natural's was trading at a 60-day moving average of about $12.50 per share. Now Algonquin, which has a 4.9% stake in Gas Natural, has taken its case to shareholders, calling on them to back its proposals or, possibly, a change in the target's board. Video provided by TheStreet
Powered by NewsLook.com
Robot Parking Valet Creates Stress-Free Travel

Robot Parking Valet Creates Stress-Free Travel

AP (July 23, 2014) — 'Ray' the robotic parking valet at Dusseldorf Airport in Germany lets travelers to avoid the hassle of finding a parking spot before heading to the check-in desk. (July 23) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

    Health News

      Environment News

        Technology News



          Save/Print:
          Share:  

          Free Subscriptions


          Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

          Get Social & Mobile


          Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

          Have Feedback?


          Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
          Mobile iPhone Android Web
          Follow Facebook Twitter Google+
          Subscribe RSS Feeds Email Newsletters
          Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins