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The Influence of the Capping Layer on the Perpendicular Magnetic Anisotropy in Permalloy Thin Films.
- Source :
- IEEE Transactions on Magnetics; Nov2014, Vol. 50 Issue 11, p1-4, 4p
- Publication Year :
- 2014
-
Abstract
- In this paper, we show that perpendicular magnetic anisotropy can be achieved in polycrystalline Ni80Fe20 films on MgO underlayers grown on thermally oxidized Si substrates. The perpendicular magnetic anisotropy is already present in the as-deposited films and preserved after thermal annealing. This paper points out the crucial role of the capping layer on the perpendicular magnetic anisotropy stabilization. By changing the nature of the capping from MgO, V, Nb to Ta, the value of the surface anisotropy constant is increased from 0.3 ± 0.05 erg/ \mathrmcm^\textbf 2 in the case of the MgO to 0.79 ± 0.06 erg/ \mathrmcm^\textbf 2 in the case of the Ta capping, respectively. For Ta capped samples, the perpendicular magnetization is achieved for Ni80Fe20 films with an effective thickness below 1.1 nm. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00189464
- Volume :
- 50
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Magnetics
- Publication Type :
- Academic Journal
- Accession number :
- 100027349
- Full Text :
- https://doi.org/10.1109/TMAG.2014.2320296