Abstract
We report on novel ferromagnetic Mn/Ge multilayers for spintronics applications investigated both experimentally and theoretically. Two Mn/Ge multilayers are grown on GaAs (001) substrates by molecular beam epitaxy. The period of each multilayer consists of an Mn layer of varying thickness (0.6 and 5 A) and a 10 A thick Ge spacer layer. From temperature-dependent magnetization and hysteresis loop measurements, the Mn (0.6 A)/Ge (10 A) multilayer showed very weak ferromagnetic ordering, which is persistent up to 260 K, whereas the Mn (5 A)/Ge (10 A) multilayer exhibited strong ferromagnetism up to 305 K. The coercive field of the Mn (5 A)/Ge (10 A) multilayer was 277 Oe at 200 K. Density functional electronic band structure calculations on a number of Mn/Ge (001) multilayers determined them to be ferromagnetic, and estimates of their critical temperatures are reported.
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.