Question:
Ferrimagnetic materials are found in
Ferrimagnetic materials are found in
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Ferrites and iron oxides (like Magnetite, \( \text{Fe}_3\text{O}_4 \)) are classic examples of ferrimagnetic compounds. Remember that they combine high electrical resistivity with strong magnetic properties.
Updated On: Jun 25, 2026
- \( \text{Iron oxides like magnetite} \)
- \( \text{Copper} \)
- \( \text{Silicon} \)
- \( \text{Aluminium} \)
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The Correct Option is A
Solution and Explanation
Concept:
Ferrimagnetism is a type of magnetism exhibited by materials containing populations of atoms or ions with opposing magnetic moments that are unequal in magnitude. As a result, a spontaneous net magnetization remains. This differs from antiferromagnetism, where the opposing moments completely cancel out to zero.
Step 1: Analyzing Magnetic Configurations of the Listed Materials
- Magnetite (\( \text{Fe}_3\text{O}_4 \)): It contains both \( \text{Fe}^{2+} \) and \( \text{Fe}^{3+} \) ions situated on two different crystallographic sites (tetrahedral and octahedral sites). The magnetic moments of these sublattices align antiparallel to each other, but because the magnitude of moments on the two sublattices is unbalanced, a net magnetic moment results. This is the definition of a ferrimagnetic material. - Copper (\( \text{Cu} \)): Diamagnetic metal with no permanent magnetic dipoles. - Silicon (\( \text{Si} \)): Diamagnetic semiconductor. - Aluminium (\( \text{Al} \)): Paramagnetic metal with weak, disordered magnetic alignment under zero applied field.
Step 1: Analyzing Magnetic Configurations of the Listed Materials
- Magnetite (\( \text{Fe}_3\text{O}_4 \)): It contains both \( \text{Fe}^{2+} \) and \( \text{Fe}^{3+} \) ions situated on two different crystallographic sites (tetrahedral and octahedral sites). The magnetic moments of these sublattices align antiparallel to each other, but because the magnitude of moments on the two sublattices is unbalanced, a net magnetic moment results. This is the definition of a ferrimagnetic material. - Copper (\( \text{Cu} \)): Diamagnetic metal with no permanent magnetic dipoles. - Silicon (\( \text{Si} \)): Diamagnetic semiconductor. - Aluminium (\( \text{Al} \)): Paramagnetic metal with weak, disordered magnetic alignment under zero applied field.
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