No, it’s not only metals that respond to magnetic forces. While metals like iron, cobalt, and nickel are the most known magnetic materials, other non-metallic materials are also magnetic. Even the electrons in wood or paper can act on magnetic fields, which is why they are called diamagnetic.
One key group is the ferrites, ceramic-like materials made by mixing iron oxide (rust) with other elements. Ferrites are used in many electronic devices because they can carry magnetic signals without conducting electricity, which can be useful.
Another example is specific plastic polymers that have magnetic particles embedded in them. These magnetic plastics can be lightweight, flexible, and can be shaped into various forms, making them useful for specific applications. Additionally, there are organic molecules and certain compounds that can exhibit magnetic properties under specific conditions.
However, it’s important to note that not all materials that respond to magnetic forces are attracted to magnets in the way that magnetic metals are. Some materials are only weakly magnetic, and others might be repelled by magnetic fields (diamagnetic). In fact, in 1998, a frog was levitated mid-air using a magnet that was a million times stronger than the magnetic field of Earth.
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