Advertisement

Electron Acoustic Effects in Metallic Magnetic Multilayers

  • V. I. Okulov
  • V. V. Ustinov
  • E. A. Pamyatnykh
  • V. V. Slovikovskaya
Chapter
Part of the NATO Science Series book series (ASHT, volume 55)

Abstract

The main properties of metallic magnetic multilayers (superlattice) of Fe/Cr type such as the type of magnetic ordering, dependence of electrical resistance on the magnetic field are defined by itinerant electrons. However, sufficiently complete theory of electron states in these multilayered metallic systems has not been developed up to now. Therefore, there are considerable difficulties, in particular, in the rigorous treatment of the mechanisms of the giant magnetoresistance and the role of intermediate nonmagnetic layers in forming the antiparallel and noncollinear magnetic structures [1]. These difficulties are mainly due to the deficit of experimental data on electron parameters. In the present paper we notice new possibilities which can be of interest in studying the propagation of elastic waves in metallic multilayers. At low temperatures the ultrasonic absorption and dependence of acoustic parameters on the magnetic field are defined by itinerant electrons. We have developed quasi-classical kinetic theory of electron magnetoacoustic effects in multilayers in the frameworks of the model of imperfect boundaries proposed in [2]. The results obtained allow us to describe the dependencies of effective elastic moduli on the magnetization and magnetic field strength. These dependencies are defined both by the parameters of electron structure and the defects of interfaces. We can estimate what of these factors is dominating.

Keywords

Acoustic Parameter Ferromagnetic Layer Neighbor Layer Giant Magnetoresistance Spin Splitting 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Camley, R.E. and Stamps, R.L. (1993) Magnetic multilayers: spin configurations exitations and giant magnetoresistasnce, J.Phys: Condens. Matter 5, 3727–3786.ADSCrossRefGoogle Scholar
  2. 2.
    Kravtsov, E.A., Okulov, V.I., and Ustinov, V.V. (1996) Simple theory of giantmagnetoresistance effect in magnetic metallic superlattices with imperfect interfaces, Solid State Commun. 99, 39–41.ADSCrossRefGoogle Scholar
  3. 3.
    Okulov, V.I., Pamyatnykh, E.A., Slovikovskaya, V.V., and Ustinov, V.V. (1996) Efectronic mechanism of sound velocity variation induced by magnetic field in magnetically ordered metalsuperlattices, Low Temp. Phys. 22, 639–640.ADSGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 1998

Authors and Affiliations

  • V. I. Okulov
    • 1
  • V. V. Ustinov
    • 1
  • E. A. Pamyatnykh
    • 2
  • V. V. Slovikovskaya
    • 2
  1. 1.Institute of Metal Physics of Urals Branch of the Academy of SciencesEkaterinburgRussia
  2. 2.Urals State UniversityEkaterinburgRussia

Personalised recommendations