Strong perpendicular magnetic anisotropy in Ni/Co(111) single crystal superlattices

Girod, S.; Gottwald, M.; Andrieu, S.; Mangin, S.; McCord, J.; Fullerton, Eric E.; Beaujour, J.-M. L.; Krishnatreya, B. J.; Kent, A. D.
June 2009
Applied Physics Letters;6/29/2009, Vol. 94 Issue 26, p262504
Academic Journal
Single crystal Ni/Co(111) superlattices have been grown by molecular beam epitaxy. The Ni thickness is 3 ML whereas the Co thickness varies from 0.2 to 4 ML. The superlattices were studied using magnetometry and ferromagnetic resonance spectroscopy and they all exhibit strong perpendicular to the plane magnetic anisotropy. The maximum magnetocrystalline anisotropy is obtained for one cobalt monolayer. Kerr microscopy measurements show the variation of domain pattern as the Co layer thickness changes.


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