  The magnetic ground state of BaFe12O19 (BFO) was investigated using X-ray
absorption at 1.2 K and 1.5 K, respectively. The XMCD measurements on
single-crystals of BFO in grazing incidence geometry reveal the canting of the
spins away from the c-axis of the hexagonal unit cell. Single-crystal neutron
diffraction studies reveal magnetic satellite peaks along the 00l reciprocal
lattice row around the forbidden l = 2n +/- 1 positions confirming conical-type
magnetic structure in the ground state of BFO. The observation of the conical
magnetic structure of BFO opens the possibility of type-II multiferroicity in
undoped BFO also.
