Abstract
Magnetic properties of oxygen exposed on the ultrathin Co/Ge(1 1 1) films have been investigated by surface magneto-optic Kerr effect (SMOKE). After being exposed on the 15–30 monolayers (ML) Co/Ge(1 1 1) films, the oxygen atoms only distribute on the topmost layer of Co films. The oxygen layer influences the electronic density of states of Co only on the topmost layer and leads to reduction in the saturated magnetization. Besides, the appearance of the Co/O interface forms additional interfacial anisotropy; consequently, coercivity of ultrathin Co/Ge(1 1 1) film is enhanced. As an example for 15 ML Co/Ge(1 1 1), the coercivity increases from 730 to 920 Oe with 200 L of oxygen exposure. Besides, the film with thinner Co layer exhibits stronger coercivity enhancement effect after exposing 200 L oxygen.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
