Can you give me examples of hard and soft irons?

Hard irons, also known as hard magnetic materials, include alloys like alnico and certain steel types, which retain significant magnetization after being subjected to a magnetic field. Soft irons, on the other hand, are materials like pure iron or low-carbon steel that can be easily magnetized and demagnetized, making them ideal for applications such as electromagnets and transformer cores. Their ability to quickly respond to magnetic fields makes soft irons suitable for devices where rapid magnetic changes are necessary.