Interlayer exchange coupling in perpendicularly magnetized Pt/Co/Ir/Co/Pt structures. (26th October 2017)

• Record Type: Journal Article
• Authors: Gabor, M S; Petrisor, T; Mos, R B; Nasui, M; Tiusan, C; Petrisor, T
• Is Part Of: Journal of physics. Volume 50:Number 46(2017)
• Publication Date: 2017-10-26
• Subjects: interlayer exchange coupling -- perpendicular magnetic anisotropy -- lattice strains; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aa8ece
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: The occurrence of both interlayer exchange coupling and perpendicular magnetic anisotropy is evidenced in Pt/Co/Ir/Co/Pt magnetron sputtered structures. We point out the effect of lattice strains on stabilizing the perpendicular magnetic anisotropy. The surface magnetic anisotropy constant is around 1.76 erg cm −2 and around 1.5 erg cm −2 for the Co layers, depending on their positioning within the stack. We demonstrate a relatively high interlayer exchange constant of −2.5 erg cm −2 at the first antiferromagnetic coupling maximum corresponding to an exchange field larger than 12 kOe. The interlayer exchange coupling shows remarkable annealing endurance being preserved for annealing temperatures up to 400 °C.