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Question
Explain the following with suitable examples:
Ferrimagnetism
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Solution
- The substances in which the magnetic moments of the domains are aligned in parallel and anti-parallel directions, in unequal numbers, are said to have ferrimagnetism.
- Examples include Fe3O4 (magnetite), ferrites such as MgFe2O4 and ZnFe2O4.
- Ferrimagnetic substances are weakly attracted by a magnetic field as compared to ferromagnetic substances. On heating, these substances become paramagnetic.
Schematic alignment of magnetic moments in ferrimagnetic substances
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(Atomic number of Fe = 26, Cu = 29, Co = 27 and Ni = 28)
