Please use this identifier to cite or link to this item:
|Title:||Sign of tunneling magnetoresistance in Cr O2-based magnetic tunnel junctions|
|Citation:||Leo, T., Kaiser, C., Yang, H., Parkin, S.S.P., Sperlich, M., Güntherodt, G., Smith, D.J. (2007). Sign of tunneling magnetoresistance in Cr O2-based magnetic tunnel junctions. Applied Physics Letters 91 (25) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.2825475|
|Abstract:||Half-metallic ferromagnets are potentially useful as electrodes in magnetic tunnel junctions (MTJs) because of the possibility for 100% spin polarization near the Fermi energy. We report tunneling magnetoresistance (TMR) behavior of MTJs having epitaxial Cr O2 (100) as one electrode, CoFe as second electrode, and MgO as tunnel barrier, i.e., Ti O2 (100) Cr O2 (100) MgOCoFe. When Cr O2 is exposed to air, several monolayers of oxide surface decompose and negative MR is observed. Conversely, sample surfaces protected by thin Mg layers show small but positive MR consistent with intrinsic spin polarization. Thus, the TMR sign can be reversed simply by subtle modifications to the Cr O2 MgO interface. © 2007 American Institute of Physics.|
|Source Title:||Applied Physics Letters|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Oct 15, 2018
WEB OF SCIENCETM
checked on Oct 8, 2018
checked on Oct 20, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.