Final answer:
The best materials for creating man-made permanent magnets are neodymium alloys and iron-based ferromagnetic alloys, which are widely used for their strong magnetic properties.
Step-by-step explanation:
The two best materials used to make man-made permanent magnets are neodymium and iron-based ferromagnetic alloys. Neodymium magnets, which are made from an alloy of neodymium, iron, and boron, are the strongest type of permanent magnet available commercially. The alloys of iron with other ferromagnetic elements such as cobalt, nickel, and gadolinium also provide strong magnetic properties suitable for creating permanent magnets. Combining these materials with electromagnets can produce particularly strong magnetic effects, especially when high magnetic field strength is required, such as in industrial lifting or particle accelerators.