Abstract
Spin reorientation transitions (SRTs) of ultrathin Co/Pd(111) films induced byadsorption of atoms and molecules have been investigated by means of Co LIII,II-edgex-ray magnetic circular dichroism (XMCD). We have examined CO, NO, Oand H as chemisorbed species. We observed the adsorbate-induced SRTfrom surface parallel to perpendicular magnetization at 200 K in thecases of CO and NO on 4.5 ML Co/Pd(111), while O or H adsorptionhas been found not to lead to the transition on 4.5 ML Co. We haveinvestigated the detailed Co-thickness dependence in the case of CO andhave found that the critical thickness of the SRT in CO-adsorbed Cois ∼6.5 ML, which is greater by ∼3 ML than that of clean Co (∼3.5 ML).From the sum rule analysis, it has been found that the surface parallelorbital moment is reduced after CO adsorption, while the surface normalorbital moment is left unchanged. We can conclude that the observedstabilization of perpendicular magnetic anisotropy due to adsorption isascribed to quenching of the surface parallel magnetic orbital moment.
Sign-in/Register to access full text options 
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.
