Back to Search
Start Over
First-principles investigation of the very large perpendicular magnetic anisotropy at Fe∣MgO and Co∣MgO interfaces.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Aug2011, Vol. 84 Issue 5, p54401:1-54401:5. 5p. - Publication Year :
- 2011
-
Abstract
- The perpendicular magnetic anisotropy (PMA) arising at the interface between ferromagnetic transition metals and metallic oxides was investigated via first-principles calculations. In this work very large values of PMA, up to 3 erg/cm2, at Fe∣MgO interfaces are reported, in agreement with recent experiments. The origin of PMA is attributed to overlap between O-pz and transition metal dz2 orbitals hybridized with dxz(yz) orbitals with stronger spin-orbit coupling-induced splitting around the Fermi level for perpendicular magnetization orientation. Furthermore, it is shown that the PMA value weakens in the case of over- or underoxidation due to the fact that oxygen pz and transition metal dz2 orbital overlap is strongly affected by disorder, in agreement with experimental observations in magnetic tunnel junctions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 84
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 67006281
- Full Text :
- https://doi.org/10.1103/PhysRevB.84.054401