U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Science and Technology
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
 
Old 07-30-2010, 02:44 PM
 
713 posts, read 3,023,972 times
Reputation: 540

Advertisements

Strained Graphene Creates Pseudo-Magnetic Fields Stronger Than Any Before Seen | Popular Science

Quote:
Putting the right kind of strain on a patch of graphene can make super-strong pseudo-magnetic fields, a new study says. The finding sheds new light on the properties of electromagnetism, not to mention the odd properties of graphene, according to researchers at Lawrence Berkeley National Laboratory. When graphene is stretched to form "nanobubbles," the stress causes electrons to behave as if they were subject to huge magnetic fields, the size of which have never been seen in a lab before.
Quote:
Since scientists began studying magnetic fields more than 100 years ago, no one has been able to sustain big magnetic fields for very long. The record is 85 tesla -- a measurement of electromagnetism named for Nikola Tesla -- and it only lasted a few thousandths of a second. Make it stronger than that, and the magnets blow themselves apart.
Quote:
But in Crommie's study, electrons inside carbon atoms behaved as if they were subjected to 300 tesla.
Reply With Quote Quick reply to this message

 
Old 07-31-2010, 07:31 AM
 
Location: Forests of Maine
29,723 posts, read 47,507,271 times
Reputation: 17577
Perhaps another form of energy that we have not tapped yet?
Reply With Quote Quick reply to this message
 
Old 08-01-2010, 09:00 AM
 
Location: Somewhere in northern Alabama
16,851 posts, read 51,335,478 times
Reputation: 27726
Interesting, but the Pop Sci article is typical in missing the mark while attempting to appeal to readers. In the writer's defense, he did link to a much better article here: Graphene Under Strain Creates Gigantic Pseudo-Magnetic Fields Berkeley Lab News Center

Unpaired electrons, and the alignment of one their spins (similar to the spin of the Earth on its axis as it rotates around the sun) are considered to be the source of magnetic fields. The electrons, being unpaired, wander in a cloud. Get a few of them spinning with similar orientation of spins while wandering, and a sensible magnetism appears.

This article shows a similar effect can be observed within a tightly bound area of a stressed lattice, with only a minimal number of electrons involved.

I've always been fascinated by magnetism, and repeatedly drawn back to wondering about it (sorry about the pun). I think I finally have an idea of what is going on with it. The classical idea is that unpaired electron spin (as in how the Earth spins on its axis as opposed to how is spins around the sun) is the cause. If the spins line up, then there is obvious magnetism, if they don't, the spins cancel each other and there is no apparent magnetism.

Next, consider that magnetic "lines of force" can be modified and channeled, exhibit resiliency and the materials only exhibit magnetism up to a certain temperature, at which point the alignment falls apart and magnetism disappears.

We know that magnetism is not a ray or packet of energy like a photon, since we cannot "project" magnetism by itself. We know that it doesn't quite follow the inverse square law, since the forces in a long bar magnet only sorta follow the bar and inverse square law. We know that magnetic materials exhibit some crystal-like properties, in requiring alignment, ceasing to exhibit at certain temperatures, etc.

One way this all makes sense is that the magnetic material does NOT only physically exist as a bar of iron, but that each atom of that bar of iron is actually a cloud of sub-atomic particles that has a central locus within the bar, but is present in some form outside of what we perceive as the bar. The mass of the particles that are present outside of the bar is either non-existent or minuscule, but then electrons have little mass.

The electron cloud would have a periodicity based on harmonics of the speed and shape of rotation around the nucleus. The resiliency exhibited is the exact same centripetal momentum exhibited by a gyroscope, only on an electron level. Since electrons have far fewer collisions with air molecules than gyroscopic toys, the decay rate of the momentum into entropic movement is slow, but IIRC, magnets DO lose their properties over time and have to be "recharged."

What becomes even more interesting is the idea that all materials likely have an electron cloud, and when those atoms and electrons are in alignment, they exhibit more complex properties, intrinsic to the alignment and frequency of the harmonics.

That could present answers as to WHY homeopathy can work, even in double blind studies, little nagging WTF experiences, like why I have different reactions to just being around quantities of various metals, and a host of other effects.
Reply With Quote Quick reply to this message
 
Old 08-03-2010, 02:10 AM
 
Location: PRC
2,709 posts, read 2,983,980 times
Reputation: 2457
another scientific 'discovery' fed to us from our space research program no doubt. Next they will be 'discovering' levitation without superconductors, then all kinds of things.
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Science and Technology
Similar Threads
Follow City-Data.com founder on our Forum or

All times are GMT -6.

2005-2018, Advameg, Inc.

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top