Hall effects in Gd-Co sputtered films

Gd-Co films which have uniaxial magnetic anisotropy perpendicular to the film plane are prepared by the rf-sputtering technique. The transverse Hall effect and the planar Hall effect are studied on these films. Results obtained show that the transverse Hall effect is much larger than the planar one in these films. It is also found that the extraordinary Hall effect plays a dominant role in the transverse Hall effect. At the compensation temperature the polarity of the Hall voltage is reversed. The hysteresis loop of the Hall characteristic corresponds to the M-H loop observed by the Kerr magneto-optic effect.