抄録
Gd-Co films which have uniaxial magnetic anisotropy perpendicular to the film plane are prepared by the rf-sputtering method. The transverse Hall effect and the planar Hall effect are studied with these films. It is found that the extraordinary Hall effect plays a dominant role in the transverse Hall effect in these films. It is also found that the hysteresis loop of the Hall effect corresponds to the M-H loop observed by the Kerr magneto-optic effect. The planar Hall effect is negligibly small compared to the transverse one. The hysteresis loop of the Hall effect varies remarkably its shape with temperature, and the polarity of the Hall voltage is reversed at the compensation temperature. A Gd-Co film can be used as practical Hall effect device considering its high sensitivity to magnetic field. In this paper several applications of the extraordinary Hall effect in Gd-Co sputtered films are also proposed.
