Energy exchange with Intrinsic Electron Spin
- From: softwarelabus@xxxxxxxxx
- Date: 21 Apr 2005 07:40:58 -0700
In search of a Quantum Physics Guru ;-)
Large scale example,
If we wrap a circular loop of wire (a one loop coil) and have current
flowing through the coil, we get the classical donut shaped magnetic
field. Let's say this loop of wire is 1 cm in radius. Now lets make a
bigger loop of wire of say 1 meter. If we increase current in both
wires (same direction of current flow) there is an induced voltage /
emf in the opposite direction of current flow. Thereby resisting any
change in current flow. If we decrease the current, then obviously
there's a force in the direction of current flow on the electrons. So
as the current increase, energy is removed from the 1 meter and 1 cm
system. The energy goes into forming a magnetic field. As current
decreases, energy is added to both systems.
Medium scale example,
Now lets replace the 1 cm loop with paramagnetic material. So we know
that the magnetic field in paramagnetic material is caused by electrons
traveling in a loop. Hence, a very tiny loop of current. We will note
that when the current increases in the 1 meter loop there will be an
increase in magnetic field in the paramagnetic material and energy is
removed from the 1 meter system and the paramagnetic material. The
energy goes into forming a magnetic field. And when the current
decreases energy is added to both 1 meter wire system and the
paramagnetic material.
Small scale example,
Now lets replace the paramagnetic material with ferromagnetic material.
We will note that the magnetic field in ferromagnetism comes from the
Intrinsic Electron Spin, not to be confused with the electron orbital
spin. So it is said in quantum physics that the electron has a plus or
minus 1/2 spin. Although we cannot truly picture quantum mechanics, it
is suggested by analogy that the intrinsic electron spin is charge that
is spinning-- it has a magnetic moment. This idea that the Intrinsic
Electron Spin generating a magnetic field also matches the donut shaped
magnetic field. In other words, the resulting magnetic field generated
by ferromagnetism results in the same shape as if it was generated by a
loop of spinning charge. Now lets say we have a permanent magnet
inside the 1 meter loop of wire. Obviously the magnetic field
generated by the permanent magnet is generated by some charge that is
spinning. Quantum physics clearly shows this to be the Intrinsic
Electron Spin. So, as we increase the current flow in our 1 meter wire
(in same magnetic polarity as the magnet), there is an EM force in the
opposite direction that the charge is flowing. This opposing EM force
removes some energy from the 1 meter loop, BUT how can this opposing
force remove energy from the Intrinsic Electron Spin? Surely we cannot
have an electron with a spin of say 0.4999999999. Could it be possible
that the electron instead will slow down in its velocity to preserve
the quantum 0.5 spin?
I appreciate any positive contributions to the above.
Kind regards,
Paul
.
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