Topic: Material Science
The temperature below which certain materials are antiferromagnetic and above which they are paramagnetic is called
- A. Weiss temperature
- B. Curie temperature
- C. Neel temperature
- D. None of the above
Answer: C. Neel temperature
Explanation: The Neel temperature ($T_N$) is the critical temperature above which an antiferromagnetic material becomes paramagnetic. Below this temperature, the material's magnetic susceptibility decreases as temperature drops.