Permanent magnets & maximum force

1. Jun 14, 2007

Thrice

What's the theoretical maximum force? At a certain distance & per kg, i guess. How would you go about calculating this?

2. Jun 15, 2007

Jack111

Very difficult to calculate without some microscopic details of the system.

If you had a hysteresis curve for the material you could calculate the field strength nearby the magnet roughly, but it'd still be geometry dependent and probably not that accuracte to the real system.

3. Jun 15, 2007

Thrice

But is there an upper limit for all materials? I was under the impression there's a limit to how strong (per unit mass or something) permanent magnets can get. I'll try track down the link.

Last edited: Jun 15, 2007
4. Jun 16, 2007

Thrice

Source: http://www.llnl.gov/str/November03/Post.html

Last edited: Jun 16, 2007