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Hard Magnetic Materials. Soft Magnetic Materials. 1. Materials which retain their magnetism and are difficult to demagnetize are called hard magnetic materials. These materials retain their magnetism even after the removal of the applied magnetic field. Hence these materials are used for making permanent magnets.n permanent magnets the movement of the domain wall is prevented. They are prepared by heating the magnetic materials to the required temperature and then quenching them. Impurities increase the strength of hard magnetic materials. Soft magnetic materials are easy to magnetize and demagnetize.
The Earth is one big magnet. Electricity is the movement of magnetism. Magnets have a north and south pole because the force of magnetism is flowing from north to the south. The Earth has a north and south pole named so because of the magnetic force flowing through it.As you go toward the north or south pole, you begin to enter greater magnetic forces.1) If Gravity and Magnetism are different forces then why does a magnet come to rest aligned with the North and South pole of the earth. Q2) Has there been any study on magnetic forces between to magnets under various gravitational environments (Moon, Space and on Earth).