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Q. The variation of magnetic susceptibility $(\chi)$ with absolute temperature $T$ for a ferromagnetic material is

Magnetism and Matter

Solution:

Susceptibility of a ferromagnetic substance falls with rise of temperature $\left(\chi=\frac{c}{T-T_{c}}\right)$ and the substance becomes paramagnetic above Curie's temperature, so magnetic susceptibility becomes very small above Curie's temperature.