Volume 81, Number 3, February 2008
Article Number 37002
Number of page(s) 6
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 19 December 2007
EPL, 81 (2008) 37002
DOI: 10.1209/0295-5075/81/37002

Effect of electron interactions on the conductivity and exchange coupling energy of disordered metallic magnetic multilayer

V. A. Zyuzin1, 2 and A. Yu. Zyuzin1

1  A.F. Ioffe Physical-Technical Institute - 194021 St. Petersburg, Russia
2  Department of Physics, University of Utah - Salt Lake City, UT 84112, USA

received 6 September 2007; accepted in final form 21 November 2007; published February 2008
published online 19 December 2007

We consider the effect of electron-electron interactions on the current-in-plane (CIP) conductivity and exchange coupling energy of a disordered metallic magnetic multilayer. We analyze its dependence on the value of ferromagnetic splitting of conducting electrons and on ferromagnetic-layers relative magnetizations orientation. We show that the contribution to the CIP conductivity and exchange coupling energy as a periodic function of the angle of magnetizations relative orientation experience $2\pi \rightarrow \pi $ transition depending on the characteristic energies, i.e. ferromagnetic splitting of the conducting electrons and the Thouless energy of paramagnetic layer.

71.10.Ca - Electron gas, Fermi gas.
75.47.-m - Magnetotransport phenomena; materials for magnetotransport.

© EPLA 2008