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1.24. What type of substances would make better permanent magnets, ferromagnetic or ferrimagnetic. Justify your answer.
Answers (1)
Substances like iron, cobalt (Ferromagnetic) can make better permanent magnets because in the solid state these substances are grouped together in small regions called domains. Each domain acts like a tiny magnet. They are randomly arranged when placed in the unmagnetised state. But when they are placed in magnetic field domains align in direction of the magnetic field. But in case of ferrimagnetic materials domains are aligned in parallel and anti-parallel direction, which lead to loss of total magnetic effect.
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