Why is There an Upper Limit to the Susceptibility of Spin Glasses?

抄録

By analyzing fundamental experimental observations of the field and time dependence of the magnetic susceptibility of spin glasses we infer that the sole significance of the spin glass freezing temperature, T_g, is that the equilibrium susceptibility attains an upper limit at this temperature. This upper limit to the equilibrium susceptibility is strongly field dependent, whereas the relaxation rate of the spin system is only weakly field dependent and remains virtually unchanged through T_g.