Ion induced magnetization reorientation in Co/Pt multilayers for patterned media

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Co/Pt multilayer films with perpendicular magnetic anisotropy and large out-of-plane coercivities of 3.9 - 8.5 kOe have been found to undergo a spin reorientation transition from out-of-plane to in-plane upon irradiation with 700 keV nitrogen ions. X-ray reflectivity experiments show that the multilayer structure gets progressively disrupted with increasing ion dose, providing direct evidence for local atomic displacements at the Co/Pt interfaces. This effectively destroys the magnetic interface anisotropy, which was varied by about a factor of two, between KS@ 0.4 erg/cm2 and KS@ 0.85 erg/cm2 for two particular films. The dose required to initiate spin-reorientation, 6x1014 N+/cm2 and 1.5x1015 ... continued below

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Weller, D.; Baglin, J.E.E.; Kellock, A.J.; Hannibal, K.A.; Toney, M.F.; Kusinski, G. et al. January 1, 2000.

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Co/Pt multilayer films with perpendicular magnetic anisotropy and large out-of-plane coercivities of 3.9 - 8.5 kOe have been found to undergo a spin reorientation transition from out-of-plane to in-plane upon irradiation with 700 keV nitrogen ions. X-ray reflectivity experiments show that the multilayer structure gets progressively disrupted with increasing ion dose, providing direct evidence for local atomic displacements at the Co/Pt interfaces. This effectively destroys the magnetic interface anisotropy, which was varied by about a factor of two, between KS@ 0.4 erg/cm2 and KS@ 0.85 erg/cm2 for two particular films. The dose required to initiate spin-reorientation, 6x1014 N+/cm2 and 1.5x1015 N+/cm2, respectively, scales with KS. It is roughly equal to the number of Co interface atoms per unit interface area contributing to KS.

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  • Journal Name: Journal of Applied Physics; Journal Volume: 87; Journal Issue: 9 PT2; Other Information: Journal Publication Date: May 1 2000

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  • Report No.: LBNL--46726
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 787094
  • Archival Resource Key: ark:/67531/metadc720591

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  • January 1, 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • April 5, 2016, 1:27 p.m.

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Weller, D.; Baglin, J.E.E.; Kellock, A.J.; Hannibal, K.A.; Toney, M.F.; Kusinski, G. et al. Ion induced magnetization reorientation in Co/Pt multilayers for patterned media, article, January 1, 2000; California. (digital.library.unt.edu/ark:/67531/metadc720591/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.