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originally posted by: Flyingclaydisk
Take a look at the following picture. At first it doesn't seem like much, a simple magnet floating above another apparent magnet held in stasis by the opposing magnetic fields, right? But wait...
That's not what's actually going on here. The black object is indeed a magnet, but the object it's floating above is actually a high temperature superconductor cooled with liquid nitrogen. Perpetual electric current in the superconductor creates a field which excludes the magnetic field of the magnet. It's not a new concept, the Meissner Effect; it was discovered in 1933.
However, when we couple the notion of a superconductor with the notion of a superfluid there are some pretty mind boggling implications.
Now, if we consider that up to 30% of the mass of the planet Jupiter is comprised of Metallic Hydrogen, a superfluid, and scientific research is advancing in the areas of high temperature superconductors (i.e. room temperature), well, WOW! So, we don't really understand what we're looking at exactly. There are things going on which we can cause to occur, but we don't understand fully why.
Now go back and look at the picture again for a moment.
It is both breathtaking and mind blowing in the same moment.
Perhaps even a bit...Spooky.
originally posted by: JBurns
a reply to: Flyingclaydisk
Great read FCD
Didn't know you were interested in physics, I am to a degree but lack a lot of understanding of the core concepts involved. I always found the results of various experiments and especially relativity and the study of what time is and how it works to be interesting and also dumbfounding.... and when you start to consider the implications these results have on the world around us and maybe even our reality... it is unsettling
Thanks for such a fascinating post.
superfluidity and superconductors are another area of research I semi-actively keep up with (mostly through phys.org and arxiv)
Sure you are familiar with this, but here is a good resource for anyone else that enjoys staying up to date on all sorts of sciences: arxiv.org...
originally posted by: dragonridr
As for it being metallic Hydrogen, there was nothing else it could be. It started as hydrogen was put under pressure and gained metallic properties.
The work comes from the lab of Mikhail Eremets and colleagues at the Max Planck Institute for Chemistry in Mainz, Germany. Eremets and his colleagues say they have observed lanthanum hydride (LaH10) superconducting at the sweltering temperature of 250 K, or –23 °C.
The key to this discovery was creation of a metallic, hydrogen-rich compound at very high pressures: roughly 2 million atmospheres. The researchers used diamond anvil cells, devices used to create high pressures, to squeeze together miniscule samples of lanthanum and hydrogen. They then heated the samples and observed major changes in structure. This resulted in a new structure, LaH10, which the researchers previously predicted would be a superconductor at high temperatures.
While keeping the sample at high pressures, the team observed reproducible change in electrical properties. They measured significant drops in resistivity when the sample cooled below 260 K (minus 13 C, or 8 F) at 180-200 gigapascals of pressure, presenting evidence of superconductivity at near-room temperature.