Answer: Antiparallel spins of unequal magnitudes giving a net moment.
- A All magnetic spins aligned perfectly parallel throughout the lattice
- B All spins antiparallel with exactly equal magnitudes, cancelling completely
- C Antiparallel spins of unequal magnitudes giving a net moment
- D No unpaired electrons present anywhere in the solid
Correct answer: C. Antiparallel spins of unequal magnitudes giving a net moment
Explanation: In ferrimagnetic materials, adjacent magnetic moments are antiparallel but of different magnitudes, resulting in a net non-zero magnetic moment. Fe₃O₄ is a classic example.
The three cubic unit cells: Simple Cubic has atoms only at corners; Body-Centred adds one atom at the centre; Face-Centred adds one atom at the centre of each of the 6 faces, giving the highest packing efficiency.
Concept context
Explore the ordered world of crystalline solids: unit cells, packing, defects, and how structure determines electrical and magnetic properties.