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

D. Weller; J. E.E. Baglin; A. J. Kellock; K. A. Hannibal; M. F. Toney; G. Kusinski; S. Lang; L. Folks; M. E. Best; B. D. Terris

doi:10.1063/1.372516

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

D. Weller, J. E.E. Baglin, A. J. Kellock, K. A. Hannibal, M. F. Toney, G. Kusinski, S. Lang, L. Folks, M. E. Best, B. D. Terris

Research output: Contribution to journal › Conference article › peer-review

98 Scopus citations

Abstract

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 2, between K_S≅0.4 erg/cm² and K_S ≅ 0.85 erg/cm² for two particular films. The dose required to initiate spin-reorientation, 6 × 10¹⁴N⁺/cm² and 1.5 × 10¹⁵N⁺/cm², respectively, scales with K_S. It is roughly equal to the number of Co interface atoms per unit interface area contributing to K_S.

Original language	English (US)
Pages (from-to)	5768-5770
Number of pages	3
Journal	Journal of Applied Physics
Volume	87
Issue number	9 II
DOIs	https://doi.org/10.1063/1.372516
State	Published - May 2000
Externally published	Yes
Event	44th Annual Conference on Magnetism and Magnetic Materials - San Jose, CA, United States Duration: Nov 15 1999 → Nov 18 1999

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General Physics and Astronomy

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@article{850f1da174a948b29707d18ddc43d0e6,

title = "Ion induced magnetization reorientation in Co/Pt multilayers for patterned media",

abstract = "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 2, between KS≅0.4 erg/cm2 and KS ≅ 0.85 erg/cm2 for two particular films. The dose required to initiate spin-reorientation, 6 × 1014N+/cm2 and 1.5 × 1015N+/cm2, respectively, scales with KS. It is roughly equal to the number of Co interface atoms per unit interface area contributing to KS.",

author = "D. Weller and Baglin, {J. E.E.} and Kellock, {A. J.} and Hannibal, {K. A.} and Toney, {M. F.} and G. Kusinski and S. Lang and L. Folks and Best, {M. E.} and Terris, {B. D.}",

year = "2000",

month = may,

doi = "10.1063/1.372516",

language = "English (US)",

volume = "87",

pages = "5768--5770",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics Publising LLC",

number = "9 II",

note = "44th Annual Conference on Magnetism and Magnetic Materials ; Conference date: 15-11-1999 Through 18-11-1999",

}

TY - JOUR

T1 - Ion induced magnetization reorientation in Co/Pt multilayers for patterned media

AU - Weller, D.

AU - Baglin, J. E.E.

AU - Kellock, A. J.

AU - Hannibal, K. A.

AU - Toney, M. F.

AU - Kusinski, G.

AU - Lang, S.

AU - Folks, L.

AU - Best, M. E.

AU - Terris, B. D.

PY - 2000/5

Y1 - 2000/5

N2 - 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 2, between KS≅0.4 erg/cm2 and KS ≅ 0.85 erg/cm2 for two particular films. The dose required to initiate spin-reorientation, 6 × 1014N+/cm2 and 1.5 × 1015N+/cm2, respectively, scales with KS. It is roughly equal to the number of Co interface atoms per unit interface area contributing to KS.

AB - 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 2, between KS≅0.4 erg/cm2 and KS ≅ 0.85 erg/cm2 for two particular films. The dose required to initiate spin-reorientation, 6 × 1014N+/cm2 and 1.5 × 1015N+/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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U2 - 10.1063/1.372516

DO - 10.1063/1.372516

M3 - Conference article

SN - 0021-8979

VL - 87

SP - 5768

EP - 5770

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 9 II

T2 - 44th Annual Conference on Magnetism and Magnetic Materials

Y2 - 15 November 1999 through 18 November 1999

ER -

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

Abstract

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