Abstract
The spin polarization of the valence band electronic states of strained bcc $\mathrm{Co}(001)$ and $\mathrm{MgO}∕\mathrm{Co}(001)$ thin films grown onto a bcc $\mathrm{Fe}(001)$ seed layer on $\mathrm{GaAs}(001)$ are investigated by employing spin-resolved photoemission spectroscopy. The experimental results are compared with the calculated energy band structure of bcc and bct $\mathrm{Co}(001)$, and discussed in the framework of the interband transition model, which allows one to ascribe the observed spectral features to bands of given spin and spatial symmetry. In contrast to the positive spin polarization observed at the $\mathrm{MgO}∕\mathrm{Fe}(001)$ interface, a large negative spin polarization of the electronic states at the Fermi level is observed for the $\mathrm{MgO}∕\mathrm{Co}∕\mathrm{Fe}∕\mathrm{GaAs}(001)$ system. Such a large negative spin polarization is attributed to a change in the energy band structure at the bct Co/bcc $\mathrm{Fe}(001)$ interface.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.