1. Boltaev A.P., Pudonin F.A., Sherstnev I.A.
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, , 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 size 6-30 nm Distance between islands 1 – 6 nm Number of layers 1-20

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

6. Magnetoresistance of (FeNi-CoNi)10

7. Kerr effect for system (FeNi-CoNi)20 at different orientation 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

14. Results of modeling

15. Vortex magnetic field in samples

16. Results of vortex magnetic field action

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

18. Conclusion
Thanks you!

19. Possible situation