Properties of lithographically formed cobalt and cobalt alloy single crystal patterned media

S. Ganesan; C. M. Park; K. Hattori; H. C. Park; R. L. White; H. Koo; R. D. Gomez

doi:10.1109/20.908650

Properties of lithographically formed cobalt and cobalt alloy single crystal patterned media

S. Ganesan, C. M. Park, K. Hattori, H. C. Park, R. L. White, H. Koo, R. D. Gomez

KU-KIST Graduate School of Converging Science and Technology

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

12 Citations (Scopus)

Abstract

We have fabricated single crystal cobalt and Co₉₀Cr₁₀ islands of dimension 130 nm × 330 nm × 20 nm by a direct-write electron beam lithography and ion-milling process. The islands have the crystalline easy axis along the short axis. These islands have been characterized by magnetic force microscope in the presence of an applied field. About 85% of the as-grown cobalt islands were single domain and rest 15% showed a bi-domain state. The as-grown Co₉₀Cr₁₀ islands were all in a single domain state. In remanence all the islands were single domain in both the pure and the alloyed films. Two modes of switching were observed. Some of the islands switched by going through a bi-domain state and the rest switched directly from a single domain state to a single domain state.

Original language	English
Pages (from-to)	2987-2989
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	36
Issue number	5 I
DOIs	https://doi.org/10.1109/20.908650
Publication status	Published - 2000 Sept
Event	2000 International Magnetics Conference (INTERMAG 2000) - Toronto, Ont, Canada Duration: 2000 Apr 9 → 2000 Apr 12

Keywords

Electron beam lithography
Magnetic force microscopy
Magnetic recording
Patterned media

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/20.908650

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title = "Properties of lithographically formed cobalt and cobalt alloy single crystal patterned media",

abstract = "We have fabricated single crystal cobalt and Co90Cr10 islands of dimension 130 nm × 330 nm × 20 nm by a direct-write electron beam lithography and ion-milling process. The islands have the crystalline easy axis along the short axis. These islands have been characterized by magnetic force microscope in the presence of an applied field. About 85% of the as-grown cobalt islands were single domain and rest 15% showed a bi-domain state. The as-grown Co90Cr10 islands were all in a single domain state. In remanence all the islands were single domain in both the pure and the alloyed films. Two modes of switching were observed. Some of the islands switched by going through a bi-domain state and the rest switched directly from a single domain state to a single domain state.",

keywords = "Electron beam lithography, Magnetic force microscopy, Magnetic recording, Patterned media",

author = "S. Ganesan and Park, {C. M.} and K. Hattori and Park, {H. C.} and White, {R. L.} and H. Koo and Gomez, {R. D.}",

note = "Funding Information: Manuscript received February 12, 2000. This work was supported by the NSF, under Grant ECS 9710395. S. Ganesan, C. M. Park, K. Hattori, H. C. Park, and R. L. White are with the Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305 USA (e-mail: sganesan@stanford.edu). H. Koo and R. D. Gomez are with the Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742 USA (e-mail: rdgomez@eng.umd.edu). Publisher Item Identifier S 0018-9464(00)07938-3.; 2000 International Magnetics Conference (INTERMAG 2000) ; Conference date: 09-04-2000 Through 12-04-2000",

year = "2000",

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language = "English",

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T1 - Properties of lithographically formed cobalt and cobalt alloy single crystal patterned media

AU - Ganesan, S.

AU - Park, C. M.

AU - Hattori, K.

AU - Park, H. C.

AU - White, R. L.

AU - Koo, H.

AU - Gomez, R. D.

N1 - Funding Information: Manuscript received February 12, 2000. This work was supported by the NSF, under Grant ECS 9710395. S. Ganesan, C. M. Park, K. Hattori, H. C. Park, and R. L. White are with the Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305 USA (e-mail: sganesan@stanford.edu). H. Koo and R. D. Gomez are with the Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742 USA (e-mail: rdgomez@eng.umd.edu). Publisher Item Identifier S 0018-9464(00)07938-3.

PY - 2000/9

Y1 - 2000/9

N2 - We have fabricated single crystal cobalt and Co90Cr10 islands of dimension 130 nm × 330 nm × 20 nm by a direct-write electron beam lithography and ion-milling process. The islands have the crystalline easy axis along the short axis. These islands have been characterized by magnetic force microscope in the presence of an applied field. About 85% of the as-grown cobalt islands were single domain and rest 15% showed a bi-domain state. The as-grown Co90Cr10 islands were all in a single domain state. In remanence all the islands were single domain in both the pure and the alloyed films. Two modes of switching were observed. Some of the islands switched by going through a bi-domain state and the rest switched directly from a single domain state to a single domain state.

AB - We have fabricated single crystal cobalt and Co90Cr10 islands of dimension 130 nm × 330 nm × 20 nm by a direct-write electron beam lithography and ion-milling process. The islands have the crystalline easy axis along the short axis. These islands have been characterized by magnetic force microscope in the presence of an applied field. About 85% of the as-grown cobalt islands were single domain and rest 15% showed a bi-domain state. The as-grown Co90Cr10 islands were all in a single domain state. In remanence all the islands were single domain in both the pure and the alloyed films. Two modes of switching were observed. Some of the islands switched by going through a bi-domain state and the rest switched directly from a single domain state to a single domain state.

KW - Electron beam lithography

KW - Magnetic force microscopy

KW - Magnetic recording

KW - Patterned media

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U2 - 10.1109/20.908650

DO - 10.1109/20.908650

M3 - Conference article

AN - SCOPUS:0034260641

SN - 0018-9464

VL - 36

SP - 2987

EP - 2989

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

IS - 5 I

T2 - 2000 International Magnetics Conference (INTERMAG 2000)

Y2 - 9 April 2000 through 12 April 2000

ER -

Properties of lithographically formed cobalt and cobalt alloy single crystal patterned media

Abstract

Keywords

ASJC Scopus subject areas

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