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Träfflista för sökning "WFRF:(Magnus Fridrik) ;pers:(Leifer Klaus 1965)"

Sökning: WFRF:(Magnus Fridrik) > Leifer Klaus 1965

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1.
  • Magnus, Fridrik, et al. (författare)
  • Tuneable exchange-spring stiffness in amorphous magnetic trilayer structures
  • 2021
  • Ingår i: Journal of Physics. - : Institute of Physics Publishing (IOPP). - 0953-8984 .- 1361-648X. ; 33:44
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigate the magnetic properties of amorphous Sm10Co90/Co-60(Al70Zr30)(40)/Co-85(Al70Zr30)(15) exchange-spring magnet trilayers. The magnetically soft Co-85(Al70Zr30)(15) layer is coupled to the magnetically hard Sm10Co90 layer through the weakly magnetic low-T (c) Co-60(Al70Zr30)(40) spacer layer. The strength of the coupling can be controlled with temperature and the coupling persists above the intrinsic T (c) of the spacer layer due to a long-range magnetic proximity effect. Polarized neutron reflectivity is used to examine the magnetic profile of the trilayers during magnetization reversal. A two-step switching occurs, with the switching angle of the soft layer strongly dependent on the strength of the coupling. In the strong coupling regime a magnetic state can be achieved where the soft layer magnetization is perpendicular to the hard layer whereas in the weak coupling regime the soft layer reverses fully.
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2.
  • Warnatz, Tobias, et al. (författare)
  • The impact of number of repeats N on the interlayer exchange in [Fe/MgO]N(001) superlattices
  • 2021
  • Ingår i: Scientific Reports. - : Springer Nature. - 2045-2322. ; 11
  • Tidskriftsartikel (refereegranskat)abstract
    • The strength of the interlayer exchange coupling in [Fe/MgO]N(001) superlattices with 2 <= N <= 10 depends on the number of bilayer repeats (N). The exchange coupling is antiferromagnetic for all the investigated thicknesses while being nine times larger in a sample with N = 4 as compared to N = 2. The sequence of the magnetic switching in two of the samples (N = 4, N = 8) is determined using polarized neutron reflectometry. The outermost layers are shown to respond at the lowest fields, consistent with having the weakest interlayer exchange coupling. The results are consistent with the existence of quantum well states defined by the thickness of the Fe and the MgO layers as well as the number of repeats (N) in [Fe/MgO]N(001)superlattices.
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  • Resultat 1-2 av 2
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tidskriftsartikel (2)
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refereegranskat (2)
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Hjörvarsson, Björgvi ... (2)
Magnus, Fridrik (2)
Ali, Hasan, 1985- (2)
Leifer, Klaus, 1... (2)Ta bort avgränsningen
Pálsson, Gunnar K. (1)
Arnalds, U. B. (1)
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Warnatz, Tobias (1)
Strandqvist, Nanny (1)
Vorobiev, Alexei (1)
Palonen, Heikki (1)
Sanz, Sarah (1)
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Uppsala universitet (2)
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Engelska (2)
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Naturvetenskap (2)
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2021 (2)

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