Seedlayer and preheating effects on crystallography and recording performance of CoCrPtB perpendicular media

Min Zheng; Geon Choe; Kenneth E. Johnson; Lan Gao; Sy Hwang Liou

doi:10.1109/TMAG.2002.801792

Seedlayer and preheating effects on crystallography and recording performance of CoCrPtB perpendicular media

Min Zheng, Geon Choe, Kenneth E. Johnson, Lan Gao, Sy Hwang Liou

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

23 Scopus citations

Abstract

The effects of seedlayer (SL) and preheating on the crystallographic, magnetic, and recording properties of CoCr₁₈Pt₁₆B₄ granular perpendicular magnetic media have been investigated. For the media with Ru as underlayer, although higher preheating improves both coercivity and squareness, the media is much noisier. With introducing Ta SL, Ru (0002)/Co (0002) crystallography is greatly enhanced. High coercivity, unity squareness, and negative nucleation field are achieved even at low preheating without degrading signal-to-noise ratio. In addition, the media is magnetically stable for a wide range of recording density.

Original language	English (US)
Pages (from-to)	1979-1981
Number of pages	3
Journal	IEEE Transactions on Magnetics
Volume	38
Issue number	5 I
DOIs	https://doi.org/10.1109/TMAG.2002.801792
State	Published - Sep 2002
Event	2002 International Magnetics Conference (Intermag 2002) - Amsterdam, Netherlands Duration: Apr 28 2002 → May 2 2002

Keywords

Crystallography
Granular media
Perpendicular recording
Ru UL
Ta SL
Thermal stability

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2002.801792

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title = "Seedlayer and preheating effects on crystallography and recording performance of CoCrPtB perpendicular media",

abstract = "The effects of seedlayer (SL) and preheating on the crystallographic, magnetic, and recording properties of CoCr18Pt16B4 granular perpendicular magnetic media have been investigated. For the media with Ru as underlayer, although higher preheating improves both coercivity and squareness, the media is much noisier. With introducing Ta SL, Ru (0002)/Co (0002) crystallography is greatly enhanced. High coercivity, unity squareness, and negative nucleation field are achieved even at low preheating without degrading signal-to-noise ratio. In addition, the media is magnetically stable for a wide range of recording density.",

keywords = "Crystallography, Granular media, Perpendicular recording, Ru UL, Ta SL, Thermal stability",

author = "Min Zheng and Geon Choe and Johnson, {Kenneth E.} and Lan Gao and Liou, {Sy Hwang}",

note = "Funding Information: Manuscript received February 13, 2002; revised May 19, 2002. This work was supported in part by the Army Research Office under Grant DAAD19-00-1-0119. M. Zheng, G. Choe, and K. E. Johnson are with MMC Technology, Inc., San Jose, CA 95131 USA (e-mail: minzheng@mmctechnology.com). L. Gao and S.-H. Liou are with the Department of Physics and Astronomy, University of Nebraska, Lincoln, NE 68588 USA. Digital Object Identifier 10.1109/TMAG.2002.801792.; 2002 International Magnetics Conference (Intermag 2002) ; Conference date: 28-04-2002 Through 02-05-2002",

year = "2002",

month = sep,

doi = "10.1109/TMAG.2002.801792",

language = "English (US)",

volume = "38",

pages = "1979--1981",

journal = "IEEE Transactions on Magnetics",

issn = "0018-9464",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

number = "5 I",

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TY - JOUR

T1 - Seedlayer and preheating effects on crystallography and recording performance of CoCrPtB perpendicular media

AU - Zheng, Min

AU - Choe, Geon

AU - Johnson, Kenneth E.

AU - Gao, Lan

AU - Liou, Sy Hwang

N1 - Funding Information: Manuscript received February 13, 2002; revised May 19, 2002. This work was supported in part by the Army Research Office under Grant DAAD19-00-1-0119. M. Zheng, G. Choe, and K. E. Johnson are with MMC Technology, Inc., San Jose, CA 95131 USA (e-mail: minzheng@mmctechnology.com). L. Gao and S.-H. Liou are with the Department of Physics and Astronomy, University of Nebraska, Lincoln, NE 68588 USA. Digital Object Identifier 10.1109/TMAG.2002.801792.

PY - 2002/9

Y1 - 2002/9

N2 - The effects of seedlayer (SL) and preheating on the crystallographic, magnetic, and recording properties of CoCr18Pt16B4 granular perpendicular magnetic media have been investigated. For the media with Ru as underlayer, although higher preheating improves both coercivity and squareness, the media is much noisier. With introducing Ta SL, Ru (0002)/Co (0002) crystallography is greatly enhanced. High coercivity, unity squareness, and negative nucleation field are achieved even at low preheating without degrading signal-to-noise ratio. In addition, the media is magnetically stable for a wide range of recording density.

AB - The effects of seedlayer (SL) and preheating on the crystallographic, magnetic, and recording properties of CoCr18Pt16B4 granular perpendicular magnetic media have been investigated. For the media with Ru as underlayer, although higher preheating improves both coercivity and squareness, the media is much noisier. With introducing Ta SL, Ru (0002)/Co (0002) crystallography is greatly enhanced. High coercivity, unity squareness, and negative nucleation field are achieved even at low preheating without degrading signal-to-noise ratio. In addition, the media is magnetically stable for a wide range of recording density.

KW - Crystallography

KW - Granular media

KW - Perpendicular recording

KW - Ru UL

KW - Ta SL

KW - Thermal stability

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DO - 10.1109/TMAG.2002.801792

M3 - Conference article

AN - SCOPUS:0036762383

VL - 38

SP - 1979

EP - 1981

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 5 I

T2 - 2002 International Magnetics Conference (Intermag 2002)

Y2 - 28 April 2002 through 2 May 2002

ER -

Seedlayer and preheating effects on crystallography and recording performance of CoCrPtB perpendicular media

Abstract

Keywords

ASJC Scopus subject areas

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