How to make a strong magnet?

If you can find a very strong magnet, repeatedly rub it across your weakened magnet. The strong magnet will realign the magnetic domains inside the weakened magnet [source: Luminaltech]. Magnet stacking One way to make weak magnets stronger is by stacking more of them together. read more

Rub the rod with two magnets, drawing the north pole of one magnet from the center of the rod to one end while you draw the south pole of the other magnet in the opposite direction. Hang the bar vertically and hit it repeatedly with a hammer. The magnetizing effect is stronger if you heat the rod. Induce a magnetic field with an electric current. read more

Three Methods: Making a Paperclip Magnet Making an Electromagnet Making a Compass Magnet Community Q&A Magnets are made by exposing ferromagnetic metals like iron and nickel to magnetic fields. When these metals are heated to a certain temperature, they become permanently magnetized. read more