Properties of sputtered Gd-Co films for magnetic bubbles

Stripe domains and bubble domains are observed in Gd-Co sputtered films. The domain patterns are different from one another for different preparation conditions. In this paper, preparation conditions and some properties of Gd-Co films, namely the domain pattern observed by the polar Kerr magneto-optic effect and the M-H loops measured by the Kerr and the Hall effect, are reported. The temperature dependence of the M-H loop is studied about the compensation temperature. The properties of Gd-Co sputtered films are discussed not only for bubble domain but also for thermomagnetic application.