Application of magnetooptical spectroscopy for investigation of spin fluctuations in Fe sub(2)P above its Curie temperature

Magnetooptical and magnetic properties of the films of weak itinerant ferromagnet Fe sub(2)P with T sub(c) = 290 K have been studied in a wide temperature range. Temperature dependence of inverse magnetic susceptibility Chi super(-1)(T) in the paramagnetic range has an anomaly at T sub(s) = 630 K. Above this temperature Chi super(-1)(T) follows the Curie-Weiss law. A magnetooptical signal is observed above T sub(c) and vanishes near T sub(s). It has been concluded, that in Fe sub(2)P films in paramagnetic range the magnetooptical signal arises from the regions with local dynamic magnetization, which is created by space correlations of the spin fluctuations.