Featured Research

from universities, journals, and other organizations

Superconducting strip could become an ultra-low-voltage sensor

Date:
April 30, 2012
Source:
Springer
Summary:
Researchers studying a superconducting strip observed an intermittent motion of magnetic flux which carries vortices inside the regularly spaced weak conducting regions carved into the superconducting material. These vortices resulted in alternating static phases with zero voltage and dynamic phases, which are characterized by non-zero voltage peaks in the superconductor.

Minute-scale interactions govern electronic behaviour of superconductors with potential applications for voltage measurement techniques.
Credit: Image courtesy of Springer

Researchers studying a superconducting strip observed an intermittent motion of magnetic flux which carries vortices inside the regularly spaced weak conducting regions carved into the superconducting material. These vortices resulted in alternating static phases with zero voltage and dynamic phases, which are characterised by non-zero voltage peaks in the superconductor.

Related Articles


This study, which is about to be published in European Physical Journal B, was carried out by scientists from the Condensed Matter Theory Group of the University of Antwerp, Belgium, working in collaboration with Brazilian colleagues.

Superconductors, when subjected to sufficiently strong magnetic fields, feature vortices that carry quantized amounts of magnetic flux, although the natural tendency of superconductors is to expel such flux. The authors relied on the Ginzburg-Landau theory to study the dynamic of the nanometric- to millimetric-scale-width superconducting strip, which was subjected to a magnetic field applied at a right angle and a current applied alongside its length.

Typically, weakly acting superconducting regions are natural impediments for the passage of electrical current.

However, the authors found that they also work as efficient pathways for vortices to enter and exit the superconducting strip. The increasing magnetic field also increases the density of mutually repelling vortices, which stimulates vortex motion across the strip in the presence of an external current. At the same time, the barrier for vortex entry and exit on the strip boundaries is also dependent on the magnetic field.

This interplay of magnetic-field-dependent barriers and vortex-vortex interaction results in an on/off vortex motion in increasing magnetic fields.Due to the simple geometry of the strip, these results can be confirmed experimentally in magnetoresistance measurements.

These findings could be applicable in gate devices used to control various modes of on/off states in electrical systems which operate in specific windows of temperature, applied magnetic field, current and voltage.


Story Source:

The above story is based on materials provided by Springer. Note: Materials may be edited for content and length.


Journal Reference:

  1. G. R. Berdiyorov, A. R. Romaguera, M. V. Milošević, M. M. Doria, L. Covaci, F. M. Peeters. Dynamic and static phases of vortices under an applied drive in a superconducting stripe with an array of weak links. The European Physical Journal B, 2012; 85 (4) DOI: 10.1140/epjb/e2012-30013-7

Cite This Page:

Springer. "Superconducting strip could become an ultra-low-voltage sensor." ScienceDaily. ScienceDaily, 30 April 2012. <www.sciencedaily.com/releases/2012/04/120430101032.htm>.
Springer. (2012, April 30). Superconducting strip could become an ultra-low-voltage sensor. ScienceDaily. Retrieved April 1, 2015 from www.sciencedaily.com/releases/2012/04/120430101032.htm
Springer. "Superconducting strip could become an ultra-low-voltage sensor." ScienceDaily. www.sciencedaily.com/releases/2012/04/120430101032.htm (accessed April 1, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Wednesday, April 1, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Voice-Controlled GPS Helmet to Help Bikers

Voice-Controlled GPS Helmet to Help Bikers

Reuters - Innovations Video Online (Apr. 1, 2015) Motorcyclists will no longer have to rely on maps or GPS systems, both of which require riders to take their eyes off the road, once a new Russian smart helmet goes on sale this summer. Jim Drury reports. Video provided by Reuters
Powered by NewsLook.com
Wound-Healing Laser Soon to Be a Reality Israeli Scientist

Wound-Healing Laser Soon to Be a Reality Israeli Scientist

Reuters - Innovations Video Online (Apr. 1, 2015) Israeli scientists says laser bonding of tissue allows much faster healing and less scarring. Amy Pollock has more. Video provided by Reuters
Powered by NewsLook.com
7-Year-Old Girl Gets 3-D Printed 'robohand'

7-Year-Old Girl Gets 3-D Printed 'robohand'

AP (Mar. 31, 2015) Although she never had much interest in prosthetic limbs before, Faith Lennox couldn&apos;t wait to slip on her new robohand. The 7-year-old, who lost part of her left arm when she was a baby, grabbed it as soon as it came off a 3-D printer. (March 31) Video provided by AP
Powered by NewsLook.com
Dutch Architects Show Off 3D House-Building Prowess

Dutch Architects Show Off 3D House-Building Prowess

Reuters - Innovations Video Online (Mar. 31, 2015) Dutch architects are constructing a 3D-printed canal-side home, which they hope will spark an environmental revolution in the house-building industry. Jim Drury reports. Video provided by Reuters
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:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

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