How is the ferrite "conditioned"? Is it magnetized? Have you reproduced
this effect? What happens to the hat pin when there is no tube?
Soft iron needles easily become magnetized. What is seen in the photo
could easily be reproduced with a ferrite magnet slab and an
[inadvertently] magnetized pin. Of course, what you described with the
levitation happening when the pin is inverted 180 degrees doesn't make
sense with that simple explanation - I am asking if you personally verified
that the ferrite slab was not permanently magnetized and that flipping the
pin still caused it to levitate.
Bob
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On August 21, 2014 10:29:27 PM "Jones Beene" <[email protected]> wrote:
From: Bob Higgins
Does this photo (slide 6) show a slab of ferrite magnet? - probably. The
long thin hat pin is magnetized and the plastic tube keeps the long hat
pin magnet from flipping and is thus able to levitate. I don't see
anything mysterious here. It is just showing that the ferrite slab is
permanently magnetized.
Not exactly. The pin is iron and will be attracted as a soft ferromagnet.
With a normal ferrite, the pin will touch the surface, not levitate since
the opposite field is induced. With the type of conditioning in this
ferrite, the pin seeks equilibrium in the highest concentration of magnetic
field lines, which is in the space above the billet, not touching it. You
can flip the pin over and it stays levitated where it is.
