Which type of magnetic behaviour is shown by magnetite (Fe3O4)?
Correct answer: B. Ferrimagnetism
- A. Ferromagnetism
- B. Ferrimagnetism
- C. Antiferromagnetism
- D. Diamagnetism
Explanation
Magnetite (Fe3O4) exhibits ferrimagnetic behaviour. Ferrimagnetism arises due to the unequal magnetic moments in opposite direction, resulting net magnetic moment in one direction. Magnetic moments of the domains are aligned in parallel and anti-parallel directions in unequal numbers. These materials are weakly attracted by magnetic fields as compared to ferromagnetic substances. On heating, substance loses its ferrimagnetism property and becomes paramagnetic. Fe3O4, ferrites like MgFe2O4 and ZnFe2O4 are examples of ferrimagnetism.
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Crystalline solids contain particles arranged in a regular repeating lattice described by a unit cell. Their study includes coordination number, packing efficiency, density, anisotropy, cleavage, polymorphism and common crystal systems, along with ionic, molecular, covalent network and metallic crystals. Crystalline order differs from the random arrangement of amorphous solids.
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