Advertisement

Hyperfine Interactions

, Volume 191, Issue 1–3, pp 135–141 | Cite as

Spin configurations and interfacial diffusion in exchange bias and spin valve systems with Ir–Mn antiferromagnetic pinning layers

  • V. KuncserEmail author
  • G. Schinteie
  • P. Palade
  • I. Mustata
  • C. P. Lungu
  • N. Stefan
  • H. Chiriac
  • R. Vladoiu
  • G. Filoti
Article

Abstract

Exchange bias and spin valve structures with Fe as ferromagnetic layers selectively enriched in 57Fe and Ir–Mn of different compositions as antiferromagnetic pinning layers have been prepared by r.f. sputtering. Conversion Electron Mössbauer Spectroscopy and Magneto Optic Kerr Effect have shown that the local structure and interactions in the whole ferromagnetic layers, with direct influence on their magnetic reversal processes, depend on growing order of the layers and composition of the AF layer. Interfacial atomic diffusion is the main reason of perturbing the local structure of the ferromagnet. Mössbauer Spectroscopy is a powerfool tool which allows a detailed analysis of local configurations, in order to optimize the magnetic and giant magnetoresistive parameters of such multilayers of important technological applications.

Keywords

Exchange bias Spin valves Multilayers Interfacial diffusion Magnetic behaviour 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Meiklejohn, W.H., Bean, C.P.: New magnetic anisotropy. Phys. Rev. 102, 1413 (1956)CrossRefADSGoogle Scholar
  2. 2.
    Nogues, J., Schuller, I.K.: Exchange bias. J. Magn. Magn. Mater. 192, 203–219 (1999)CrossRefADSGoogle Scholar
  3. 3.
    Kiwi, M.: Exchange bias theory. J. Magn. Magn. Mater. 234, 584–595 (2001)CrossRefADSGoogle Scholar
  4. 4.
    Dieny, B., Speriosu, V.S., Parkin, S.S.P., Gurney, B.A., Wilhoit, D.K., Mauri, D.: Giant magnetoresitance in soft ferromagnetic multilayers. Phys. Rev. B 43, 1297–1300 (1991)CrossRefADSGoogle Scholar
  5. 5.
    Kools, J.C.S.: Exchange-biased spin-valves for magnetic storage. IEEE Trans. Magn. 32, 3165 (1996)CrossRefADSGoogle Scholar
  6. 6.
    Parkin, S.: Spin polarized current in spin valves and magnetic tunnel junctions. MRS Bull. 31, 389–394 (2006)Google Scholar
  7. 7.
    Radu, F., Zabel, H.: Exchange bias effect of ferro-/antiferromagnetic heterostructures. In: Bader, S.D., Zabel, H. (eds.) Magnetic heterostructures, pp. 97–184. Springer, Berlin (2007)Google Scholar
  8. 8.
    Dieny, B.: Spin valves. In: Johnson, M. (ed.) Magnetoelectronics, pp. 67–377. Elsevier Inc. (2004)Google Scholar
  9. 9.
    McFadyen, I.R., Fullerton, E.E., Carey, M.J.: State-of-the-art magnetic hard disk drives. MRS Bull. 31, 379–383 (2006)Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  • V. Kuncser
    • 1
    Email author
  • G. Schinteie
    • 1
  • P. Palade
    • 1
  • I. Mustata
    • 2
  • C. P. Lungu
    • 2
  • N. Stefan
    • 2
  • H. Chiriac
    • 3
  • R. Vladoiu
    • 4
  • G. Filoti
    • 1
  1. 1.National Institute of Materials PhysicsBucharest-MagureleRomania
  2. 2.National Institute for Lasers, Plasma and Radiation PhysicsBucharest-MagureleRomania
  3. 3.National Institute for Technical PhysicsIasiRomania
  4. 4.Department of PhysicsOvidius UniversityConstantaRomania

Personalised recommendations