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Träfflista för sökning "WFRF:(Stanciu V.) srt2:(2005-2009)"

Search: WFRF:(Stanciu V.) > (2005-2009)

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  • Adell, Martin, et al. (author)
  • Postgrowth annealing of (Ga,Mn) As under As capping: An alternative way to increase T-C
  • 2005
  • In: Applied Physics Letters. - : AIP Publishing. - 0003-6951 .- 1077-3118. ; 86, s. 112501-
  • Journal article (peer-reviewed)abstract
    • In situ postgrowth annealing of (Ga,Mn)As layers under As capping is adequate for achieving high Curie temperatures (T-C) in a similar way as ex situ annealing in air or in N-2 atmosphere practiced earlier. Thus, the first efforts give an increase of T-C from 68 to 145 K after 2 h annealing at 180 degrees C. These data, in combination with lattice parameter determinations and photoemission results, show that the As capping acts as an efficient sink for diffusing Mn interstitials.
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  • Bexell, Ulf, et al. (author)
  • ToF-SIMS depth profiling of (Ga,Mn)As capped with amorphous arsenic : effects of annealing time
  • 2006
  • In: Applied Surface Science. - : Elsevier BV. - 0169-4332 .- 1873-5584. ; 252:19, s. 7252-7254
  • Journal article (peer-reviewed)abstract
    • The influence of annealing time on an amorphous As cap layer and the depth distribution of Mn atoms have been investigated. The results show that a 1600 Å thick As cap layer is completely desorbed after 3 h of annealing time. The depth distributions of Mn indicate that interstitial Mn atoms have diffused to the outer surface and being passivated. The thickness of the Mn passivation layer was around 90 Å.
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  • Soroka, Inna, et al. (author)
  • Structural and magnetic properties of Al2O3/Ni81Fe19 thin films : From superparamagnetic nanoparticles to ferromagnetic multilayers
  • 2005
  • In: Journal of Physics. - : IOP Publishing. - 0953-8984 .- 1361-648X. ; 17:33, s. 5027-5036
  • Journal article (peer-reviewed)abstract
    • Al2O3/Ni81Fe19 multilayer films were produced by sequential magnetron sputter deposition on thermally oxidized Si(001) substrates. By varying the thickness of the Ni81Fe19 layer from 8 to 30 Aa, while keeping the other parameters unchanged, one can control the film structure from nanoclusters to continuous multilayers. The nanoclustered sample is superparamagnetic while the continuous samples show ferromagnetic behavior. The magnetic moments per atom of the Ni81Fe19 layers decrease with decreasing amt. of metallic deposits, indicating the presence of nonmagnetic layers at the interfaces. The thicknesses of these layers are ∌1 Aa for the flat continuous film and 3.8 Aa for the nanoclustered film. The existence of nonmagnetic layers may be interpreted in terms of the formation of antiferromagnetic oxides at the interfaces. [on SciFinder(R)]
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  • Result 1-10 of 15

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