MAGNETIC RECONSTRUCTION OF THE GD(0001) SURFACE

The surface magnetism of Gd(0001) films is studied using spin resolved electron spectroscopies. Both a canted surface magnetization vector o ut of the plane of the film and an enhanced surface magnetic ordering temperature 60 +/- 2 K higher than the bulk Curie temperature are obse rved. Our results show that the surface magnetic layer behaves as a se parate entity from the bulk. The in-plane component of surface magneti zation aligns ferromagnetically to the bulk. Spin resolved photoemissi on from the Gd 4f core levels shows almost-equal-to 65% spin polarizat ion at 150 K, which extrapolates to almost-equal-to 91% at 0 K.