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

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.372516

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@article{c3605a0a960a473f983e7a8796398db7,

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",

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.

UR - https://www.scopus.com/pages/publications/0000999473

UR - https://www.scopus.com/pages/publications/0000999473#tab=citedBy

U2 - 10.1063/1.372516

DO - 10.1063/1.372516

M3 - Conference article

AN - SCOPUS:0000999473

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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