Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions

Details Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions

2010-08-04

arxiv.org/abs/1008.0761v3

Physics

Condensed Matter

Materials Science

3 pages,4 figures, 1 table

Scientific paper

10.1016/j.jmmm.2011.01.011

Using magnetron sputtering, we have prepared Co-Fe-B/tunnel barrier/Co-Fe-B magnetic tunnel junctions with tunnel barriers consisting of alumina, magnesia, and magnesia-alumina bilayer systems. The highest tunnel magnetoresistance ratios we found were 73% for alumina and 323% for magnesia-based tunnel junctions. Additionally, tunnel junctions with a unified layer stack were prepared for the three different barriers. In these systems, the tunnel magnetoresistance ratios at optimum annealing temperatures were found to be 65% for alumina, 173% for magnesia, and 78% for the composite tunnel barriers. The similar tunnel magnetoresistance ratios of the tunnel junctions containing alumina provide evidence that coherent tunneling is suppressed by the alumina layer in the composite tunnel barrier.

Affiliated with

Also associated with

No associations

Rating

Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions 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 Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tunnel magnetoresistance in alumina, magnesia and composite tunnel barrier magnetic tunnel junctions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-82686