Stress me, test me, vex me ... boffins seek Hall Effect in frustrated magnets Scientists believe a new finding could help future advanced electronics research – and it's all courtesy of some frustrated magnets. The results of a new experiment could help reveal more details about the way the frictionless transmission of electricity works, it has been claimed. Boffins at Princeton University in the US …
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I bet that physicists and biologists will find out that frustration is yet another force, probably more powerful than the strong/weak/gravitational (and whatever else is out there.)
Isn't that what drives biology? Or causes friction? Or perhaps gravitation and dark matter? Just stuff lurking out there frustrated that nobody loves it.
"Some day physicists will discover the frustrino."
Should be easy enough. In theory, all you need to generate clouds of frustinos is to interact with anyone generating a stupidity field. (Unfortunately, a far from uncommon event.)
You need to make sure the stupidity field is strong enough to cause an interaction of high enough energy to create real and not only virtual frustrinos. These experiments need to be conducted under extreme care though as the predicted properties of frustrinos indicate that they will accumulate in the core of the non stupidity field generating entity. Given the frustrinos surprisingly long half life, they risk accumulating to a critical mass causing at best a violent outburst and in worst case a stroke.
Well there's an election coming up and campaigning is well under way. That should mean we're currently surrounded by a stupidity field well into the hundreds of megaduhs.
Sounds like the perfect opportunity to indulge in some serious science with high-energy frustrinos.
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Well, I am not a physicist, but my take on it as follows:
Picture the electrons as little spinning gears, for arguments sake.
In normal non-magnetic materials, the electrons aren't oriented, and their spins are all in different directions, like gears facing in all directions. The total magnetism is null.
In magnetic materials, the electrons are aligned, and their spins have the same orientation, like aligned, but unmeshed gears. Their 'torque' is aligned, giving rise to a total magnetic field.
In frustrated magnets, the gears are aligned, but 'meshed', so each electron's spin causes its neighbor to spin in the opposite direction. Total magnetic field is null, like normal non-magnetic materials, but aligned, like magnetic materials.
Apparently, the theory they're testing is that it's the alignment, and not the total magnetic field that generates the Hall Effect, at least that's my unschooled take on it.
Anyone have a better understanding?
I haven't read any of the related work myself, and don't know that I have the background for it if I did, but coincidentally today ran across this piece, which mentions a theory that magnetic monopoles might be found in spin ice:
http://spectrum.ieee.org/semiconductors/materials/the-hunt-for-the-magnetic-monopole
That might be of interest to folks looking for more background on this area.
Actually I think you'll find that the first common automotive application of the Hall effect was in distributors, using magnetic triggering to produce exact spark timing at all revolutions[1].
Even called a "Hall effect distributor" to give the game away.
[1] If you work out how many zaps per second there are in a four-pot engine at 3000rpm, you start to understand why an undamped bent spring and cam operating contacts doesn't really cut it in this department.
Most ABS sensors that I have seen are actually inductive. Not a bad idea considering that coils of wire are a lot more robust than pieces of silicon and high-gain amplifiers.
As for the reason for doing away with mechanical points in ignition systems, you only have to look at a set after a few thousand miles to know that a transistor could do a better job. Add in the fact that the advance timing for optimum spark doesn't just depend on manifold vacuum, and you'll probably want to calculate the optimum time for the spark, and drive the coil electronically.
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