Abstract
The results of quantum calculations of the current-perpendicular-to-line giant magnetoresistance (CPL GMR) of Co/Cu(001) two-dimensional lateral superlattices are presented. They are obtained from an exact numerical evaluation of the Kubo formula using the electronic structures of Cu and Co monolayers described by $s,p,d$ tight-binding bands. The calculations show that the CPL GMR of two Co wires separated by $N$ atomic lines of Cu is strongly dependent on the Co wire widths and can be as large as 110%. The CPL GMR of finite, perfectly periodic Co/Cu(001) lateral superlattices is found to saturate after 5--6 repeats of the superlattice unit cell and reach a maximum value of $\ensuremath{\approx}$ 350%. Finally, the giant magnetoresistance ratios of superlattices with fluctuating Co wire widths are evaluated and shown to increase linearly with total superlattice length and be of the order of 1000% after 25 repeats of the superlattice unit cell.
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.