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How to find the critical Néel temperature below which the system is in the antiferromagnetic phase ? |
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Answer» Neel temperature : The neel temperature is the temperature above it the anti-ferromagnetic material become paramagnetic. Temperature dependence of the magnetic susceptibility of paramagnetic materials is given by the curie law. Xm = \(\frac{\mu_0nm^2}{[3k(T-T_e)]}\) Xm = \(\frac c{(T-T_c)}\) where μ0 = it is magnetic permeability at vaccume n = atomic density m = dipolar magnetic moment of atom A k = boltzman constant Tc = curie temp in K C = curie constant k-1 |
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