Tailoring the Hysteresis Loop of the Si/Cu(10nm)/FeMn(10-30nm)/CoFeB(10nm) Bilayer System

Abstract:

The dependence of hysteretic properties of FeMn/CoFeB (AF/FM) thin bilayers on AF thickness and magnetic annealing temperature is systematically investigated for possible applications in spin-valve devices. Inducement of an easy axis after magnetic annealing is established. The anisotropy is studied by investigating the coercivity along and perpendicular to the induced easy axis using Magneto-Optic Kerr Effect (MOKE) and the AF texture is ascertained by XRD. The existence of an optimum annealing temperature, for which the maximum change in coercivity occurs for a particular AF thickness, is evidenced. The maxima in HC of the bilayer with thickness of AF layer were correlated with FCC FeMn (111) texture of the sample.

• Periodical: Advanced Materials Research (Volumes 622-623)
• Pages: 695-699
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.622-623.695
• Online since: December 2012
• Authors: Chandra Prakash, Rajagopal Srivatsan, Himanshu Fulara, Sujeet Chaudhary
• Keywords: Anisotropy, Coercivity, CoFeB, FeMn, Kerr Effect, Magnetic Annealing, Nano-Engineering, Sputtering

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