CoFeB Thickness Dependence of Thermal Stability Factor in CoFeB/MgO Perpendicular Magnetic Tunnel Junctions

2012/01/01 by H. Sato, M. Yamanouchi, K. Miura +4 · 110 citations
Materials Science · Physics and Astronomy · #Anisotropy #Layer (electronics) #Magnetic Properties and Synthesis of Ferrites #Magnetic Properties of Alloys #Magnetic anisotropy #Magnetic properties of thin films #Magnetization #Perpendicular #Perpendicular recording #Thermal #Thermal stability #Tunnel magnetoresistance #cond-mat.mtrl-sci

paper · pdf · doi:10.1109/lmag.2012.2190722

published in IEEE Magnetics Letters 3, 3000204 (IEEE Magnetics Society) · 12 pages, 5 figures

openalex publication_date 2012/01/01 · arxiv created 2012/08/29 · arxiv updated 2012/08/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Thermal stability factor Δ of the recording layer was studied in perpendicular anisotropy CoFeB/MgO magnetic tunnel junctions (p-MTJs) with various CoFeB recording layer thicknesses and junction sizes. In all series of p-MTJs with different thicknesses, Δ is virtually independent of the junction sizes of 48-81 nm in diameter. The values of Δ increase linearly as the recording layer thickness increases. The slope of the linear fit is explained well by a model based on nucleation-type magnetization reversal.

Citations

• Thermally assisted magnetization reversal in the presence of a spin-transfer torque
• Domain Structure in CoFeB Thin Films With Perpendicular Magnetic Anisotropy

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