Influence of face-centered-cubic texturing of Co2Fe6B2 pinned layer on tunneling magnetoresistance ratio decrease in Co2Fe6B2 MgO-based p-MTJ spin valves stacked with a [Co Pd]n-SyAF layer

The TMR ratio of Co2Fe6B2 MgO-based p-MTJ spin valves stacked with a [Co Pd]n-SyAF layer decreased rapidly when the ex situ magnetic annealing temperature (Tex) was increased from 275 to 325 °C, and this decrease was associated with degradation of the Co2Fe6B2 pinned layer rather than the Co2Fe6B2 f...

Full description

Saved in:
Bibliographic Details
Published in:Nanotechnology 2015-05, Vol.26 (19)
Main Authors: Takemura, Yasutaka, Lee, Du-Yeong, Lee, Seung-Eun, Chae, Kyo-Suk, Shim, Tae-Hun, Lian, Guoda, Kim, moon, Park, Jea-Gun
Format: Article
Language:English
Subjects:
magnetic random access memory
magnetic tunnle junctions
spin transfer torque
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The TMR ratio of Co2Fe6B2 MgO-based p-MTJ spin valves stacked with a [Co Pd]n-SyAF layer decreased rapidly when the ex situ magnetic annealing temperature (Tex) was increased from 275 to 325 °C, and this decrease was associated with degradation of the Co2Fe6B2 pinned layer rather than the Co2Fe6B2 free layer. At a Tex above 325 °C the amorphous Co2Fe6B2 pinned layer was transformed into a face-centered-cubic (fcc) crystalline layer textured from [Co Pd]n-SyAF, abruptly reducing the Δ1 coherence tunneling of perpendicular-spin-torque electrons between the (100) MgO tunneling barrier and the fcc Co2Fe6B2 pinned layer.
ISSN:0957-4484
1361-6528
DOI:10.1088/0957-4484/26/19/195702