We measure the giant magnetoresistance (GMR) with the current both parallel and perpendicular to the direction of the magnetization in the ferromagnetic (FM) layers and thus probe the anisotropy of the effective mean free paths for the spin-up and spin-down electrons, seen in the anisotropic magnetoresi stance. We find that the difference of the GMR in the two configurations, when expressed in terms of the sheet conductance, displays a nearly universal behavior as a function of GMR. On interpreting the results within the Boltzmann transport formalism we demonstrate the importance of bulk scattering for GMR.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|State||Published - 1999|
Bibliographical noteFunding Information:
We wish to thank A. Balatsky for useful conversations. This work has been supported by the US Department of Energy and by the AFOSR under grant no. AF/FA9620-92-J-0185.