[fluidcruft]

I have no real idea what I'm talking about but figure 1 has critical magnetic flux curve ranging up to 3000 Oe so... in MRI-speak maybe it tops out before 0.3T? IIRC permanent magnet MRI have already been built in the 0.3T range, but they're very heavy and outclassed by the higher-field scanners. Clinical MRI nowadays typically runs at 1.5-3T (with some clinical scanners at 5-7T).

Having said that there is a resurgence of interest in low-field MRI lately, primarily marketed for use in developing nations and for combination machines that integrate radiation therapy. From what I've heard from diagnostic radiologists, the low-field MRI scanners seem to be of limited diagnostic value on their own.

Anyway that's just my thought that the best/first applications here may not be about generating magnetic fields.