title: 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.
abstract: 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.
authors.affiliation: MRAM Center, Department of Electronics, Hanyang University, Seoul, 133-791, Korea. Epitaxial Engineering Department, SUMCO CORPORATION, 1007-62 Izumisawa, Chitose-shi, Hokkaido 066-0051, Japan.
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Takemura
authors.forename: Du-Yeong
authors.initials: DY
authors.lastname: Lee
authors.forename: Seung-Eun
authors.initials: SE
authors.lastname: Lee
authors.forename: Kyo-Suk
authors.initials: KS
authors.lastname: Chae
authors.forename: Tae-Hun
authors.initials: TH
authors.lastname: Shim
authors.forename: Guoda
authors.initials: G
authors.lastname: Lian
authors.forename: Moon
authors.initials: M
authors.lastname: Kim
authors.forename: Jea-Gun
authors.initials: JG
authors.lastname: Park