MagMike, EdStainless,
Both: thanks so much. The advice is running to Samarium Cobalt, at 8.4 g/cc, yes it's a little heavier per unit, but survival is key.
Best,
Scott
I need to survey a list of materials capable of high (permanent) magnetization that will withstand modestly high temperature preparation for use (vacuum bake-out at roughly 120 C to 200 C, let's say, for a few hours).
Density of likely candidates I've seen so far run to 7.5 - 8 g/cc. This is...
