A "Neutral" Permanent Magnet

[poynt99]

I don't know if the following is possible to manufacture, but bear with me and let's assume for a moment that it is. Perhaps the process might be something as follows:

1) Create a "dead' sintered cylindrical block comprising equal mixes of both Barium (Ba) and Strontium (Sr) ferrite.

2) Assume that exposing this homogeneous block to a certain EM frequency (perhaps via NMR) can selectively "pin" either the Ba or Sr domains during magnetization.

3) Pin the Ba domains and saturate the Sr domains along the axis from N-S.

4) Next, pin the Sr domains in their new orientation, and saturate the Ba domains along the axis from S-N.

5) Assume that the resulting remnant magnetization of both are exactly equal, but in opposite directions, and that the dispersion of each domain type is highly homogeneous throughout.


Q1. What will the PM's resulting magnetic field look like?
Q2. Will there even be a detectable magnetic field around the magnet?

.99

[BEP]

Q1. What will the PM's resulting magnetic field look like?

The same as a superconductor, none. It will show rejection of an applied magnetic field.

Q2. Will there even be a detectable magnetic field around the magnet?

Of the magnet? No. If the detector is sensitive enough it will detect the ambient magnetic field and the deformation caused by the neutral magnet.

It would be nice if such a thing could be produced.