  The anomalous Hall effect is investigated for ferromagnetic Fe3Sn2 single
crystal with geometrically frustrated kagome bilayer of Fe. The scaling
behavior between anomalous Hall resistivity rho_{xy}^{A} and longitudinal
resistivity rho_{xx} is quadratic and further analysis implies that the AHE in
Fe3Sn2 single crystal should be dominated by the intrinsic Karplus-Luttinger
mechanism rather than extrinsic skew-scattering or side-jump mechanisms.
Moreover, there is a sudden jump of anomalous Hall conductivity sigma_{xy}^{A}
appearing at about 100 K where the spin-reorientation transition from the c
axis to the ab plane is completed. This change of sigma_{xy}^{A} might be
related to the evolution of Fermi surface induced by the spin-reorientation
transition.
