A Permanent Magnet That Turns On and Off

Summary by Krater

The video investigates methods for blocking or turning off permanent neodymium magnets, demonstrating that steel shields and high temperatures do not truly turn off a magnet, whereas magswitch tools use opposing internal magnets to effectively toggle the field on and off.

From the video

Answers: How do you turn off a permanent magnet?

• neodymium magnets
• magnetic shielding with steel
• Curie temperature
• magswitch permanent magnet switch

What it concludes

• Blocking a neodymium magnet with steel creates a short-circuit path for the magnetic flux rather than truly blocking the field.
• Heating a neodymium magnet past its Curie temperature of around 600 Kelvin randomizes its magnetic moments and destroys its permanent magnetism.
• Magswitch tools turn off permanent magnets by internally rotating opposing magnet configurations to redirect the magnetic flux.