"Discovery of the new property of metamagnets could also lead to more efficient heat pumps and airport scanners, perhaps within a decade, the researchers emphasised."
New York, April 30 - Within a decade, we could be using much more energy-efficient refrigerators than what we have today as researchers have now identified a new universal property of metamagnets, unleashing its potential applications for several items of everyday use.

Metamagnets are metal alloys that can undergo dramatic increases in magnetisation when a small external magnetic field is applied, such as from a permanent magnet or an electromagnet.

The magnetic effect of apparently all metamagnets is that it is non-linear, discovered the scientists.

When these metamagnets are placed in an initial magnetic field and the field is doubled, they more than double in magnetic strength.

A very useful property of this type of magnetism is in magnetic refrigeration, said Bellave Shivaram, a professor of physics at University of Virginia.

Currently, metamagnets produce efficient cooling only at very low temperatures, using superconducting magnets, making them impractical for general refrigeration.

With the new discoveries of the properties of metamagnets, they could become part of everyday home appliances within a decade or so, Shivaram added.

Current refrigerators are among the biggest consumers of energy in the home.

They include several moving parts which make them costly to repair and they can leak fluorocarbons into the atmosphere, which can deplete ozone.

Refrigerators of the future, using metamagnets, would have fewer moving parts, would not require refrigerants, and, likely would use less electricity, Shivaram noted.

In these new materials, the magnetism can be cycled on and off, enabling heat to be pumped away in a manner similar to what happens in a heat pump today, he explained.

Discovery of the new property of metamagnets could also lead to more efficient heat pumps and airport scanners, perhaps within a decade, the researchers emphasised.

The findings appeared in separate papers in the journals Physical Review B: Rapid Communications and Review of Scientific Instruments.


comments powered by Disqus
Read more on:
 NEW YORK (26931 views)
 JOURNAL (13741 views)
 SCIENTISTS (13481 views)
 PROFESSOR (9541 views)
 AIRPORT (8221 views)
 CARBON (7171 views)
 YORK (6711 views)
 SHIVA (6531 views)
 TEMPE (5841 views)
 VIRGINIA (5214 views)
 PHYSICS (4151 views)
 UMER (3451 views)
 HOME APPLIANCES (2455 views)
 ELECTRICITY (2421 views)
 MANE (2171 views)
 REFRIGERATION (872 views)
 MAGNETIC FIELD (591 views)
 REVIEW (1031 views)
 

PERMALINK

http://www.nerve.in/news:2535002370829
You can quote the permanent link above for a direct link to the story. We do not archive or expire our news stories.


STORY OPTIONS
  Email this story to a friend
  XML feed for Americas


 
COPYRIGHTS INFORMATION
All rights reserved for news content. Reproduction, storage or redistribution of Nerve content and articles in any medium is strictly prohibited.
Contact Nerve Staff for any feedback, corrections and omissions in news stories.
 

All rights reserved for the news content. Reproduction, storage or redistribution of Nerve content and articles in any medium is strictly prohibited.