New York, April 30 IANS | 6 months ago

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.

(Posted on 30-04-2014)

Share This Page:

Post your comments

Information on States of India:

Andaman Nicobar | Andhra Pradesh | Arunachal Pradesh | Assam | Bihar | Chandigarh | Chhattisgarh | Dadar Nagar Haveli | Daman Diu | Delhi | Goa | Gujarat | Haryana | Himachal Pradesh | Jammu Kashmir | Jharkhand | Karnataka | Kerala | Lakshadweep | Madhya Pradesh | Maharashtra | Manipur | Meghalaya | Mizoram | Nagaland | Orissa | Pondicherry | Punjab | Rajasthan | Sikkim | Tamil Nadu | Tripura | Uttar Pradesh | Uttaranchal | West Bengal


Andhra Pradesh Travel Map | Bihar Travel Map | Goa Travel Map | Gujarat Travel Map | Haryana Travel Map | Himachal Pradesh Map | Karnataka Travel Map | Kerala Travel Map | Maharashtra Travel Map | Punjab Travel Map | Rajasthan Travel Map | Sikkim Travel Map | Tamil Nadu Travel Map | Uttar Pradesh Travel Map | West Bengal Travel Map |


Alappuzha | Ernakulam | Idukki | Kannur | Kasaragod | Kollam | Kottayam | Kozhikode | Malappuram | Palakkad | Pathanamthitta | Thiruvananthapuram | Thrissur | Wayanad |


Airports of India | Districts of India | India Pilgrim Centers | Tourism Map of India | National Highways in India | India Railway Routes |


Ahmadabad | Bangalore | Chennai | Coimbatore | Delhi | Hyderabad/Secunderabad | Kochi | Kolkata | Mumbai | Pondicherry | Pune | Surat |