Magnetic Aftereffect in Exchange-Enhanced Paramagnetic Compound TiCo

A typical magnetic aftereffect is observed in the exchange-enhanced paramagnetic compound TiCo. This indicates that the sample contains a small number of ferromagnetic clusters, the sizes of which are near the critical value for the magnetic aftereffect. The extremely long relaxation time of the magnetization of the ferromagnetic clusters is responsible for the abnormal hysteresis in the temperature dependence of susceptibility reported previously. The size and number of ferromagnetic clusters may be related to the superconducting transition temperature.