A method for making spin valves with low and stable coupling field includes the oxygen exposure steps. In this method, a first ferromagnetic layer is deposited onto a substrate using an ion beam sputtering process. The first surface of the first ferromagnetic layer is exposed to an oxygen-rich atmosphere...http://www.google.com.tw/patents/US6661622?utm_source=gb-gplus-share專利 US6661622 - Method to achieve low and stable ferromagnetic coupling field
