Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films

J. E E Baglin; C. T. Rettner; B. D. Terris; D. Weller; J. U. Thiele; A. J. Kellock; S. Anders; T. Thomson

doi:10.1117/12.452551

Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films

J. E E Baglin, C. T. Rettner, B. D. Terris, D. Weller, J. U. Thiele, A. J. Kellock, S. Anders, T. Thomson

Research output: Chapter in Book/Report/Conference proceeding › Chapter

Abstract

For [Co(3Å)/Pt(10Å)]n multilayers and FePt(111) L10 ordered films exposed to energetic ion beam irradiation, we have experimentally determined the dependence of the perpendicular coercivity on ion dose, for a variety of ion species and energies. A simple model based on ballistic displacement of Co (or Fe) atoms from ordered configurations is presented, which predicts an exponential decline of anisotropy with ion dose. The perpendicular coercivity for these samples is indeed found to decline in this way. The ballistic displacement model, evaluated using SRIM Monte Carlo simulation, roughly reflects the observed dependence on ion species and energy. However, the experimental data would demand a displacement probability per incident ion many times larger than that obtained from SRIM.

Original language	English
Title of host publication	Proceedings of SPIE - The International Society for Optical Engineering\|Proc SPIE Int Soc Opt Eng
Pages	1-7
Number of pages	6
Volume	4468
DOIs	https://doi.org/10.1117/12.452551
Publication status	Published - 2001
Event	Engineering Thin Films with Ion Beams, Nanoscale Diagnostics, and Molecular Manufacturing - San Diego, CA Duration: 1 Jul 2001 → … http://<Go to ISI>://WOS:000174396100001

Publication series

Name	Proceedings of SPIE

Other

Other	Engineering Thin Films with Ion Beams, Nanoscale Diagnostics, and Molecular Manufacturing
City	San Diego, CA
Period	1/07/01 → …
Internet address	http://<Go to ISI>://WOS:000174396100001

Keywords

Co/Pt multilayer
FePt
Ion beam
Magnetic storage media

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10.1117/12.452551

Cite this

Baglin, J. E. E., Rettner, C. T., Terris, B. D., Weller, D., Thiele, J. U., Kellock, A. J., Anders, S., & Thomson, T. (2001). Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films. In Proceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng (Vol. 4468, pp. 1-7). (Proceedings of SPIE). https://doi.org/10.1117/12.452551

@inbook{03d3ecbdf2a74a188f1af0f99abfeefa,

title = "Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films",

abstract = "For [Co(3{\AA})/Pt(10{\AA})]n multilayers and FePt(111) L10 ordered films exposed to energetic ion beam irradiation, we have experimentally determined the dependence of the perpendicular coercivity on ion dose, for a variety of ion species and energies. A simple model based on ballistic displacement of Co (or Fe) atoms from ordered configurations is presented, which predicts an exponential decline of anisotropy with ion dose. The perpendicular coercivity for these samples is indeed found to decline in this way. The ballistic displacement model, evaluated using SRIM Monte Carlo simulation, roughly reflects the observed dependence on ion species and energy. However, the experimental data would demand a displacement probability per incident ion many times larger than that obtained from SRIM.",

keywords = "Co/Pt multilayer, FePt, Ion beam, Magnetic storage media",

author = "Baglin, {J. E E} and Rettner, {C. T.} and Terris, {B. D.} and D. Weller and Thiele, {J. U.} and Kellock, {A. J.} and S. Anders and T. Thomson",

note = "Baglin, JEE Rettner, CT Terris, BD Weller, D Thiele, JU Kellock, AJ Anders, S Thomson, T Conference on Engineering Thin Films With Ion Beams, Nanoscale Diagnostics, and Molecular Manufacturing Jul 30-31, 2001 San diego, ca Spie; Engineering Thin Films with Ion Beams, Nanoscale Diagnostics, and Molecular Manufacturing ; Conference date: 01-07-2001",

year = "2001",

doi = "10.1117/12.452551",

language = "English",

volume = "4468",

series = "Proceedings of SPIE",

pages = "1--7",

booktitle = "Proceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng",

url = "http://<Go to ISI>://WOS:000174396100001",

}

Baglin, JEE, Rettner, CT, Terris, BD, Weller, D, Thiele, JU, Kellock, AJ, Anders, S & Thomson, T 2001, Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films. in Proceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng. vol. 4468, Proceedings of SPIE, pp. 1-7, Engineering Thin Films with Ion Beams, Nanoscale Diagnostics, and Molecular Manufacturing, San Diego, CA, 1/07/01. https://doi.org/10.1117/12.452551

Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films. / Baglin, J. E E; Rettner, C. T.; Terris, B. D. et al.
Proceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng. Vol. 4468 2001. p. 1-7 (Proceedings of SPIE).

Research output: Chapter in Book/Report/Conference proceeding › Chapter

TY - CHAP

T1 - Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films

AU - Baglin, J. E E

AU - Rettner, C. T.

AU - Terris, B. D.

AU - Weller, D.

AU - Thiele, J. U.

AU - Kellock, A. J.

AU - Anders, S.

AU - Thomson, T.

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PY - 2001

Y1 - 2001

N2 - For [Co(3Å)/Pt(10Å)]n multilayers and FePt(111) L10 ordered films exposed to energetic ion beam irradiation, we have experimentally determined the dependence of the perpendicular coercivity on ion dose, for a variety of ion species and energies. A simple model based on ballistic displacement of Co (or Fe) atoms from ordered configurations is presented, which predicts an exponential decline of anisotropy with ion dose. The perpendicular coercivity for these samples is indeed found to decline in this way. The ballistic displacement model, evaluated using SRIM Monte Carlo simulation, roughly reflects the observed dependence on ion species and energy. However, the experimental data would demand a displacement probability per incident ion many times larger than that obtained from SRIM.

AB - For [Co(3Å)/Pt(10Å)]n multilayers and FePt(111) L10 ordered films exposed to energetic ion beam irradiation, we have experimentally determined the dependence of the perpendicular coercivity on ion dose, for a variety of ion species and energies. A simple model based on ballistic displacement of Co (or Fe) atoms from ordered configurations is presented, which predicts an exponential decline of anisotropy with ion dose. The perpendicular coercivity for these samples is indeed found to decline in this way. The ballistic displacement model, evaluated using SRIM Monte Carlo simulation, roughly reflects the observed dependence on ion species and energy. However, the experimental data would demand a displacement probability per incident ion many times larger than that obtained from SRIM.

KW - Co/Pt multilayer

KW - FePt

KW - Ion beam

KW - Magnetic storage media

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BT - Proceedings of SPIE - The International Society for Optical Engineering|Proc SPIE Int Soc Opt Eng

T2 - Engineering Thin Films with Ion Beams, Nanoscale Diagnostics, and Molecular Manufacturing

Y2 - 1 July 2001

ER -

Ion beam modification of perpendicular magnetic anisotropy in [Co/Pt]n multilayers and FePt thin films

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