TELECOMMUNICATIONS AND RADIO ENGINEERING - 2009 Vol. 68,
No 14 		 

 

 

 

Phenomenological Simulation of the Magnetic Order in a Granular Nanostracture on the Basis of Results of the Electron Spin Resonance Experiment

T.V. Bagmut
A. Usikov Institute of Radio Physics and Electronics,
National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkiv 61085, Ukraine

Abstract
The phenomenological model describing the phenomenon of ferromagnetic resonance (FMR) in a granular magnetic nanostructure is submitted. The model is verified by the example of study of magnetic properties of the nanostructure such as amorphous dioxide of silicon with cobalt nanoparticles (SiO2) 100-õCoõ/GaAs in the wide range of the Co-concentration (õ = 20, 30, 45, 49, 54, 63, 75 and 85% Co). It is shown that the magnetic clusters can be formed in a granular nanostructure. The shape of clusters is Co-concentration depended.

References

  1. Zolotukhin, I.V., Kalinin, Yu.K., and Sytnikov, A.V., (2006), Nano-composite structures on the way to nanoelectronics, Pryroda, 1:11-19 (in Russian).
  2. Baibich, M.N., Broto, J.M., Fert A. et. al., (1988), Giant Mag-netoresistance of (001)Fe/(001)Cr Magnetic Superlattices, Phis. Rev. Lett., 61(21):2472-2475.
  3. Bykov, I.V., Gan’shina, E.A., Granovskii, A.B., and Gushchin, V.S., (2000), Magnetorefractive effect in granular films with tunneling magnetoresistance, Physics of Solid State, 42(3), 498-502. 
  4. Levy, P.M., (1994), Giant magnetoresistance in magnetic layered and granular materials, Physics of Solid State, 47: 367-462.
  5. Lutsev, L.V., Stognii, A.I., and Novitskii, N.N., (2006), Giant injection magnetoresistance in gallium arsenide/granulated film heterostructures with nanosize cobalt inclusions, JETP, 81(10): 514-518.  
  6. Kaplienko, A.I., Nikolova, E.P., Kut'ko, K.V. et. al., (2005), Magnetic resonance and magnetic anisotropy oscillations in Co/Cu (111) superlattices, Low Temp. Phys., 31(3):471-478 (in Russian).
  7. Kakazei, G.N., Pogorelov, Yu.G., Lopes, A.M.L. et al., (2001), Tunnel magnetoresistance and magnetic ordering in ion-beam sputtered Co80Fe20/Al2O3 discontinuous multilayers, Journal of Applied Physics, 90(8):4044-4048.
  8. Krivoruchko, V.N., Marchenko, A.I., Prokhorov, A.A., (), Superparamagnetic resonance of single-domain nanoparticles of LaSrMnO3, Low Temp. Phys., 33(5):578-585 (in Russian).
  9. Yakushiji, K., Mitani, S., Takanashi, K. et al., (2000), J Magn. Magn. Mater. 212(75):243-246.
  10. Barzilai, S., Goldstein, Y., Balberg, I. et al., (1981), Phys. Rev., B23(1809):389-395.
  11. Sankar, S., Dender, D., Borchers, J. A. et al., (2000), J. Magn. Magn. Mater., 221(1).
  12. Derkach, V.N., Nedukh, S.V., Ravlik, A.G., et al., (2002), High Frequency Properties of Co/Cu Multilayer Structures in Millimeter Wavelengths Band, Telecommunications and Radio Engineering, 58(1-2):138-143.
  13. Borovik, E.S., Mil'ner, A.S., Eremenko, V.V., (1972), Lectures on magnetism, Kharkov, pp.111-114 (in Russian).
  14. Bagmut, T.V., Nedukh, S.V., Roschenko, S.T. et al., (2006), Granule size and shape influence on static and dynamic properties of magnetic nanocomposites, Journal of Magnetism and Magnetic Materials, 302:334-339.
  15. Lutsev, L.V., (2002), Spin excitations in granular structures with ferromagnetic nanoparticles, Physics of Solid State, 44(1):102-110.
  16. Kakazei, G.N., Kravets, A.F., Lesnik, N.A. et al., (1999), Ferromagnetic resonance in granular thin films, Journal of Applied Physics, 85(8):5654-5656.
  17. Kakazei, G.N., Pogorelova, Yu.G., Costa, M.D., et al., (2005), Interlayer dipolar interactions in multilayered granular films,  JournalofAppliedPhysics, 97:10A723-1-10A723-3.
  18. Lutsev, L.V., Kopytin, M.N., Sitnikov, A.V., and Stognei, O.V., (2005), Properties of Nanogranular Metal-Dielectric Composites in Strong Electric Fields and Claster Electronic States, Physics of the Solid State, 47(11):2169-2179.
  19. Vansovskii S.V., (1971), Magnetism, Nauka, Ìoscow: 1030 p. (in Russian)
  20. Stognei, O.V., Sitnikov, A.V., Kalinin, Yu.E., Avdeev, S.F., and Kopytin, M.N., (2007), Isotropic positive magnetoresistance in Co-Al2On nanocomposites, Physics of the Solid State, 49(1):164-170.
  21. Landau, L.D., and Lifshitz, Å.Ì., (1982), Electrodynamics of continuous media, Nauka, Moscow: 37-44 (in Russian).
  22. Kittel, C., (1951), Ferromagnetic resonance, J. de Phys. et Red.
  23. Eckhard Limpert, Werner À. Stahel, and Markus Abbt., (2001), Lognormal distributions across the sciences: Keys and Clues, BioScience, 51(5):341-352.
  24. Bagmut, T.V., (2005), Magnetic resonance millimeter spectroscopy of granulate nanostructures of Cox(NbLiO3)1-x, The Fifth Kharkov Conference of Young Scientists, Kharkiv, p.55 (in Russian).


pages 1271-1282

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