Spin Battery: Physicist Develops Battery Using New Source Of Energy

Researchers at the University of Miami and at the Universities of Tokyo and Tohoku, Japan, have been able to prove the existence of a “spin battery,” a battery that is “charged” by applying a large magnetic field to nano-magnets in a device called a magnetic tunnel junction (MTJ).

The new technology is a step towards the creation of computer hard drives with no moving parts, which would be much faster, less expensive and use less energy than current ones. In the future, the new battery could be developed to power cars.

The study is published in the journal Nature.

The device created by University of Miami Physicist Stewart E. Barnes, of the College of Arts and Sciences and his collaborators can store energy in magnets rather than through chemical reactions. Like a winding up toy car, the spin battery is “wound up” by applying a large magnetic field — no chemistry involved. The device is potentially better than anything found so far, said Barnes.

“We had anticipated the effect, but the device produced a voltage over a hundred times too big and for tens of minutes, rather than for milliseconds as we had expected,” Barnes said. “That this was counterintuitive is what lead to our theoretical understanding of what was really going on.”

Read more . . .

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Tags: computer hard drives, Innovation, magnetic field, magnetic tunnel junction, magnets, new technology, power cars, source of energy

This entry was posted on Sunday, March 15th, 2009 at 8:50 am and is filed under Innovation, Project Energy, Science Digest / Science Daily. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.