How can you project the future with geomagnetic changes? How do you explain a warming lower atmosphere, and cooling mid-atmosphere?
CERN Document Server: Record#1180849: On CLOUD nine
Do you own a microwave or a magnetic fridge?
The magnetocaloric effect
The magnetocaloric effect (MCE, from
magnet and
calorie) is a magneto-
thermodynamic phenomenon in which a reversible change in temperature of a suitable material is caused by exposing the material to a changing magnetic field. This is also known by low temperature physicists as
adiabatic demagnetization, due to the application of the process specifically to create a temperature drop. In that part of the overall refrigeration process, a decrease in the strength of an externally applied magnetic field allows the magnetic domains of a chosen (magnetocaloric) material to become disoriented from the magnetic field by the agitating action of the thermal energy (
phonons) present in the material. If the material is isolated so that no energy is allowed to (re)migrate into the material during this time,
i.e., an adiabatic process, the
temperature drops as the domains absorb the thermal energy to perform their reorientation. The randomization of the domains occurs in a similar fashion to the randomization at the
curie temperature, except that magnetic dipoles overcome a decreasing external magnetic field while energy remains constant, instead of magnetic domains being disrupted from internal
ferromagnetism as energy is added.
One of the most notable examples of the magnetocaloric effect is in the chemical element
gadolinium and some of its
alloys. Gadolinium's temperature is observed to increase when it enters certain magnetic fields. When it leaves the magnetic field, the temperature drops. The effect is considerably stronger for the gadolinium
alloy Gd5(
Si2Ge2).
[2] Praseodymium alloyed with
nickel (
PrNi5) has such a strong magnetocaloric effect that it has allowed scientists to approach within one thousandth of a degree of
absolute zero.
[3]
...
the temperature drops as the domains absorb the thermal energy to perform their reorientation. The randomization of the domains occurs in a similar fashion to the randomization at the curie temperature, except that magnetic dipoles overcome a decreasing external magnetic field while energy remains constant, instead of magnetic domains being disrupted from internal ferromagnetism as energy is added.
Do you know of a giant dipole with a ferrous core that is easily disprupted by a far far bigger energy emitter? Does that sound like the relationship our planet has with the sun? Yes or no?
