GEOLOGY

Detailed explanation-1: -Iron is not the only material capable of possessing a remanent magnetization . Nickel, cobalt and the lesser known gadolinium can do that as well, along with compounds that contain one of these four metals.

Detailed explanation-2: -Only ferromagnetic materials such as iron, cobalt, and nickel are attracted to magnetic fields strong enough to be truly considered magnetic. However, all metals can be placed into one of three categories: Ferromagnetic. Paramagnetic.

Detailed explanation-3: -Cobalt, iron and nickel are attracted to a magnet. Hence, they are magnetic materials.

Detailed explanation-4: -Iron and nickel are two of the most well-known ferromagnets, that is, conducting materials with a permanent magnetization1.

Detailed explanation-5: -Cobalt. Cobalt is a ferromagnetic metal. Over the past 100 years, cobalt has been used widely because of its excellent magnetic properties. Cobalt can be used to make both soft and hard magnets.