Abstract
The linear and non-linear magnetic responses of intermediate valent state have been analysed based on the periodic Anderson model. Within the intermediate valence regime the non-linear magnetic susceptibility shows a sharp dip as a function of temperature and in the limit of zero field, its magnitude is nearly divergent at a temperature T 0 where the zero field linear magnetic susceptibility shows a maximum. The magnetization in the presence of field passes through a broad maximum as a function of temperature. Around the temperature T 0 , the dependence of the total non-linear response on the square of the magnetic field is similar to that of the magnetization on the field in a paramagnet. Such a behaviour of the magnetic response resembles that observed in convential spin-glass state. The excitonic correlation decreases the non-linear response.
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