Projects per year
We show that Co2FeAl0.5Si0.5 film deposited on Si(111) has a single crystal structure and twin related epitaxial relationship with the substrate. Sub-nanometer electron energy loss spectroscopy shows that in a narrow interface region there is a mutual inter-diffusion dominated by Si and Co. Atomic resolution aberration-corrected scanning transmission electron microscopy reveals that the film has B2 ordering. The film lattice structure is unaltered even at the interface due to the substitu- tional nature of the intermixing. First-principles calculations performed using structural models based on the aberration corrected electron microscopy show that the increased Si incorporation in the film leads to a gradual decrease of the magnetic moment as well as significant spin-polarization reduction. These effects can have significant detrimental role on the spin injection from the Co2FeAl0.5Si0.5 film into the Si substrate, besides the structural integrity of this junction.
|Number of pages||5|
|Journal||Applied Physics Letters|
|Publication status||Published - 29 Apr 2016|
Bibliographical note© 2016, The author(s)
- 2 Finished
Half-metallic Ferromagnets: materials fundamentals for next-generation spintronics
Lazarov, V., Hirohata, A. & McKenna, K. P.
1/10/13 → 31/01/18
Project: Research project (funded) › Research
RPF 13/14 High-energy-resolution spectroscopy of functional nanomaterials
McKenna, K. P., Lazarov, V., Clark, J. H. & Pratt, A.
1/08/13 → 31/07/14
Project: Other project › Other internal award