MRI machines have a powerful static field. It’s created using a coil cooled by liquified gas... the low temp means the current just keeps circling without resistance. Start it up and it sort of just keeps going.
The strength is around 4 Tesla if I remember correctly. You can create a field this large at home if you charge a bank of high voltage capacitors and discharge them into a small coil with just a few turns. The coil is best made with a heavy gauge silver/copper wire...this stuff is amazingly stiff and hard to wind though.
Your enormous magnetic pulse will last only a microsecond or so and the discharge current is enough to power a small city (for a microsecond anyway)
You can crush cans with such a device...that’s the trick geeks love to perform.