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n2doc Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Mar-23-10 11:07 PM
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Strongest magnetic material created, stronger than theoretical limit
Iron-nitrogen compound forms strongest magnet known

March 22, 2010 by Lin Edwards

Fe16N2. Image credit: Kikkawa Laboratory
(PhysOrg.com) -- A group of scientists from the University of Minnesota say that Fe16N2 crystals are more magnetic than the most magnetic material previously known, and its magnetism exceeds the predicted limit of magnetism for a material.


Magnetism arises with the spinning electrons in a material, and with every electron acting as a tiny magnet with its magnetic field aligned with the axis of spin. In most atoms electrons may spin either up or down, but when most of them spin in the same direction, the material becomes magnetic. In iron, for example, there are four more spinning in one direction than in the other.

In a more complex material, the theory is that there are river-like bands of electron clouds formed as those of the individual atoms merge together. Each band contains electrons spinning in only one direction, and the materials magnetism is determined by the difference between the numbers of each type of band. Using the theory, scientists have predicted that iron-cobalt should be the most magnetic material.

A group of materials physicists from Twin Cities, Minnesota, led by Jian-Ping Wang have found a material comprising 16 iron atoms and two of nitrogen is approximately 18% more magnetic than the predicted limit. The findings of x-ray analysis of the compound showed that six iron atoms are clustered around each nitrogen, with two more located between the two clusters. The researchers said electrons flowing between the clusters act like they do in ordinary iron, but within the clusters, the electrons tend to be localized, and this increases the magnetism.


http://www.physorg.com/news188458077.html
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closeupready Donating Member (1000+ posts) Send PM | Profile | Ignore Tue Mar-23-10 11:12 PM
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1. I wish there were a way to harness the natural power of magnetism, and
turn it into energy. Thanks for posting this story. :) K&R
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IDFbunny Donating Member (530 posts) Send PM | Profile | Ignore Wed Mar-24-10 12:16 AM
Response to Reply #1
2. There is
Edited on Wed Mar-24-10 12:17 AM by IDFbunny
it's called a generator or dynamo.

A better magnet will make for a more efficient generator/motor.

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closeupready Donating Member (1000+ posts) Send PM | Profile | Ignore Wed Mar-24-10 05:30 AM
Response to Reply #2
3. Then quick! Patent it!
You'll be RICH! ;)
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krispos42 Donating Member (1000+ posts) Send PM | Profile | Ignore Thu Mar-25-10 10:38 AM
Response to Reply #3
4. You want to take on the all-powerful candle monopoly?
And the mechanical typewriter industry?

Ha! They'll find you under some shopping mall parking lot in Jersey next to Jimmy Hoffa.
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