The effects of a magnetic barrier and a nonmagnetic spacer in tunnel structures

Details The effects of a magnetic barrier and a nonmagnetic spacer in tunnel structures The effects of a magnetic barrier and a nonmagnetic spacer in tunnel structures

2004-06-11

arxiv.org/abs/cond-mat/0406290v1

J. Phys. : Condens. Matter 16 (2004) 4455

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, 5 figures

Scientific paper

10.1088/0953-8984/16/25/006

The spin-polarized transport is investigated in a new type of magnetic tunnel junction which consists of two ferromagnetic electrodes separated by a magnetic barrier and a nonmagnetic metallic spacer. Based on the transfer matrix method and the nearly-free-electron-approximation the dependence of the tunnel magnetoresistance (TMR) and electron-spin polarization on the nonmagnetic layer thickness and the applied bias voltage are studied theoretically. The TMR and spin polarization show an oscillatory behavior as a function of the spacer thickness and the bias voltage. The oscillations originate from the quantum well states in the spacer, while the existence of the magnetic barrier gives rise to a strong spin polarization and high values of the TMR. Our results may be useful for the development of spin electronic devices based on coherent transport.

Affiliated with

Also associated with

No associations

Rating

The effects of a magnetic barrier and a nonmagnetic spacer in tunnel structures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The effects of a magnetic barrier and a nonmagnetic spacer in tunnel structures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effects of a magnetic barrier and a nonmagnetic spacer in tunnel structures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-318197