Which of these metals is used for making magnets?

Today, magnets are an essential part of modern technology. The magnet industry continues to grow due to the increased demand for magnetic circuit components widely used in industrial equipment. When people think of magnets, they’re often thinking of permanent magnets. These are objects which can be magnetized to create a magnetic field. The most common example is the magnet we use to hold notes on our refrigerator door. Metals used for permanent magnets are iron, nickel, and cobalt.

Source: Metal Supermarkets