Effect of crystallographic orientation dispersion on media thermal stability and recording characteristics

Geon Choe, M. Zheng, K. E. Johnson, Kyoung Jin Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We have studied thermal stability and recording characteristics of CoCrPtB alloy media with varying c axis anisotropy dispersion, preferred orientation (PO), and in-plane orientation ratio (OR) on both glass and NiP-plated Al substrates. With increasing in-plane c axis orientation and OR, improved recording performances such as lower pulsewidth, lower media transition noise, and lower dc noise are achieved. Thermal decay rate is primarily determined by Co anisotropy dispersion and in-plane OR for the same coercivity media. Media having a large out-of-plane e axis component exhibit a wide switching field distribution and have a high signal decay rate. The PW50 and dc noise of media with out-of-plane Co grains are very sensitive to changes in write field. On the other hand, highly oriented media having high OR are less sensitive to head writability variations and offer good thermal stability with excellent recording performance.

Original languageEnglish
Pages (from-to)1955-1957
Number of pages3
JournalIEEE Transactions on Magnetics
Volume38
Issue number5 I
DOIs
Publication statusPublished - 2002 Sep 1
Externally publishedYes

Fingerprint

Anisotropy
Thermodynamic stability
thermal stability
recording
Coercive force
Glass
decay rates
Substrates
anisotropy
low noise
coercivity
glass
Hot Temperature

Keywords

  • Crystallography
  • Preferred orientation
  • Thermal stability
  • Thin-film media

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Physics and Astronomy (miscellaneous)

Cite this

Effect of crystallographic orientation dispersion on media thermal stability and recording characteristics. / Choe, Geon; Zheng, M.; Johnson, K. E.; Lee, Kyoung Jin.

In: IEEE Transactions on Magnetics, Vol. 38, No. 5 I, 01.09.2002, p. 1955-1957.

Research output: Contribution to journalArticle

@article{46758ac68eca4050be47d6eca1dbdf4e,
title = "Effect of crystallographic orientation dispersion on media thermal stability and recording characteristics",
abstract = "We have studied thermal stability and recording characteristics of CoCrPtB alloy media with varying c axis anisotropy dispersion, preferred orientation (PO), and in-plane orientation ratio (OR) on both glass and NiP-plated Al substrates. With increasing in-plane c axis orientation and OR, improved recording performances such as lower pulsewidth, lower media transition noise, and lower dc noise are achieved. Thermal decay rate is primarily determined by Co anisotropy dispersion and in-plane OR for the same coercivity media. Media having a large out-of-plane e axis component exhibit a wide switching field distribution and have a high signal decay rate. The PW50 and dc noise of media with out-of-plane Co grains are very sensitive to changes in write field. On the other hand, highly oriented media having high OR are less sensitive to head writability variations and offer good thermal stability with excellent recording performance.",
keywords = "Crystallography, Preferred orientation, Thermal stability, Thin-film media",
author = "Geon Choe and M. Zheng and Johnson, {K. E.} and Lee, {Kyoung Jin}",
year = "2002",
month = "9",
day = "1",
doi = "10.1109/TMAG.2002.802790",
language = "English",
volume = "38",
pages = "1955--1957",
journal = "IEEE Transactions on Magnetics",
issn = "0018-9464",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "5 I",

}

TY - JOUR

T1 - Effect of crystallographic orientation dispersion on media thermal stability and recording characteristics

AU - Choe, Geon

AU - Zheng, M.

AU - Johnson, K. E.

AU - Lee, Kyoung Jin

PY - 2002/9/1

Y1 - 2002/9/1

N2 - We have studied thermal stability and recording characteristics of CoCrPtB alloy media with varying c axis anisotropy dispersion, preferred orientation (PO), and in-plane orientation ratio (OR) on both glass and NiP-plated Al substrates. With increasing in-plane c axis orientation and OR, improved recording performances such as lower pulsewidth, lower media transition noise, and lower dc noise are achieved. Thermal decay rate is primarily determined by Co anisotropy dispersion and in-plane OR for the same coercivity media. Media having a large out-of-plane e axis component exhibit a wide switching field distribution and have a high signal decay rate. The PW50 and dc noise of media with out-of-plane Co grains are very sensitive to changes in write field. On the other hand, highly oriented media having high OR are less sensitive to head writability variations and offer good thermal stability with excellent recording performance.

AB - We have studied thermal stability and recording characteristics of CoCrPtB alloy media with varying c axis anisotropy dispersion, preferred orientation (PO), and in-plane orientation ratio (OR) on both glass and NiP-plated Al substrates. With increasing in-plane c axis orientation and OR, improved recording performances such as lower pulsewidth, lower media transition noise, and lower dc noise are achieved. Thermal decay rate is primarily determined by Co anisotropy dispersion and in-plane OR for the same coercivity media. Media having a large out-of-plane e axis component exhibit a wide switching field distribution and have a high signal decay rate. The PW50 and dc noise of media with out-of-plane Co grains are very sensitive to changes in write field. On the other hand, highly oriented media having high OR are less sensitive to head writability variations and offer good thermal stability with excellent recording performance.

KW - Crystallography

KW - Preferred orientation

KW - Thermal stability

KW - Thin-film media

UR - http://www.scopus.com/inward/record.url?scp=0036761631&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036761631&partnerID=8YFLogxK

U2 - 10.1109/TMAG.2002.802790

DO - 10.1109/TMAG.2002.802790

M3 - Article

AN - SCOPUS:0036761631

VL - 38

SP - 1955

EP - 1957

JO - IEEE Transactions on Magnetics

JF - IEEE Transactions on Magnetics

SN - 0018-9464

IS - 5 I

ER -