Question

Which mathematical relation expresses Weiss Law for ferromagnetic substances above the Curie temperature?

Options

• \[\chi_m\propto\frac{1}{T-T_C}\]

• \[\chi_m\propto T-T_C\]

• \[\chi_m\propto\frac{1}{T+T_C}\]

• \[\chi_m\propto\frac{1}{T}\]

Answer 1

Weiss Law states \[\chi_m\propto\frac{1}{T-T_C}\] above the Curie temperature. The denominator is the difference between absolute temperature and Curie temperature.