Band structure and density of States effects in co-based magnetic tunnel junctions |
| |
| Authors: | LeClair P Kohlhepp J T van De Vin C H Wieldraaijer H Swagten H J M de Jonge W J M Davis A H MacLaren J M Moodera J S Jansen R |
| |
| Institution: | Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. |
| |
| Abstract: | Utilizing Co/Al(2)O(3)/Co magnetic tunnel junctions with Co electrodes of different crystalline phases, a clear relationship between electrode crystal structure and junction transport properties is presented. For junctions with one fcc(111) textured and one polycrystalline (polyphase and polydirectional) Co electrode, a strong asymmetry is observed in the magnetotransport properties, while when both electrodes are polycrystalline the magnetotransport is essentially symmetric. These observations are successfully explained within a model based on ballistic tunneling between the calculated band structures (density of states) of fcc-Co and hcp-Co. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
