Thickness dependence of anomalous hall effect in 2-dimensional Fe3GeTe2*

In this talk, thickness-dependent magnetic properties of Fe3GeTe2, which is a 2-dimensional ferromagnetic conductor, will be presented. The properties were characterized by Hall effect measurement from 2K to room temperature. From the hall measurement, it exhibited the anomalous hall effect due to its intrinsic ferromagnetism. Interestingly, the magnetic properties such as coercivity changed significantly with decreasing thickness changing from weak ferromagnet to strong ferromagnet. With the changing angle of magnetic field, the coercivity changed significantly. The Curie temperature decreased with decreasing thickness below about 100nm, above which it remained unchanged over the temperature.