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Magnetic anisotropy of multilayer periodical structures from magnetic nanoislands.

Magnetic anisotropy of multilayer periodical structures from magnetic nanoislands. Boltaev A.P., Pudonin F.A., Sherstnev I.A. P.N.Lebedev Physical Institute of the Russian Academy of Science, 119991, Moscow, Russia. Contents. Introduction Some properties of multilayer island structures

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Magnetic anisotropy of multilayer periodical structures from magnetic nanoislands.

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  1. Magnetic anisotropy of multilayer periodical structures from magnetic nanoislands. Boltaev A.P., Pudonin F.A., Sherstnev I.A. P.N.Lebedev Physical Institute of the Russian Academy of Science, 119991, Moscow, Russia

  2. Contents • Introduction • Some properties of multilayer island structures • One-directional anisotropy in island structures • Rotation in of samples in magnetic field • Vortex in magnetic nanostructures • Conclusion

  3. Spin-tunneling structure

  4. Multilayer periodical island system RF-sputtering systems: (FeNi - CoNi)10 (FeNi - C) 10 (FeNiCo - Co)10 Layer thickness 0,4-0,8 nm Island size6-30 nm Distance between islands1 – 6 nm Number of layers1-20

  5. AFM and MFM images of the (FeNi-CoNi)Nstructure surface Surface topography Magnetic topograpgy of the surface

  6. Magnetoresistance of (FeNi-CoNi)10

  7. Kerr effect for system(FeNi-CoNi)20 at differentorientation of magnetic field

  8. Polar diagrams of sample magnetization

  9. Exchange anisotropy

  10. Experimental hysteresis loops

  11. The dependence of magnetization on rotation direction of sample in magnetic field.

  12. Vortexes in ferromagnetic nanoparticles Vortex in ferromagnetic disk Possible magnetization in nanoislands system

  13. Results of modeling

  14. Vortex magnetic field in samples

  15. Results of vortex magnetic field action Action Action

  16. Before action After action Result of vortex magnetic field action

  17. Conclusion Thanks you!

  18. Possible situation

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