A novel approach of carbon embedding in magnetic media for future head/disk interface

Mohammed Abdul Samad; Shaomin Xiong; Liang Pan; Hyunsoo Yang; Sujeet Kumar Sinha; David B. Bogy; Charanjit Singh Bhatia

doi:10.1109/TMAG.2011.2170826

A novel approach of carbon embedding in magnetic media for future head/disk interface

Mohammed Abdul Samad, Shaomin Xiong, Liang Pan, Hyunsoo Yang, Sujeet Kumar Sinha, David B. Bogy, Charanjit Singh Bhatia^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

A novel method of carbon embedding (≤1 nm) is used as a surface modification technique to produce overcoat free media surfaces. The filtered cathodic vacuum arc technique at ion energy of 90 eV is used to embed carbon in the top surface of a ∼25 nm iron/platinum (FePt) film. Transport of ions in matter (TRIM) simulations and X-ray photoelectron spectroscopy (XPS) are used to study carbon embedding profiles and surface chemical composition. XPS results show that carbon embedding is effective in improving the oxidation resistance of FePt. Conductive atomic force microscopy (CAFM) is done on samples after exposure to a 780 nm IR laser with an effective output power of 40 mW to study the thermal stability. No change in the conductivity is observed in the case of carbon embedded FePt surface. Ball-on-disk tribological tests are conducted at a contact pressure of 0.26 GPa on bare and modified FePt surfaces. It is observed that the coefficient of friction is reduced considerably from a value of approximately 0.8 to ∼0.27 after the surface modification.

Original language	English
Article number	6187782
Pages (from-to)	1807-1812
Number of pages	6
Journal	IEEE Transactions on Magnetics
Volume	48
Issue number	5 PART 1
DOIs	https://doi.org/10.1109/TMAG.2011.2170826
State	Published - May 2012
Externally published	Yes

Bibliographical note

Funding Information:
This work was supported by the Singapore NRF under CRP Award No. NRF-CRP 4-2008-06, the Computer Mechanics Laboratory at UC Berkeley, CA.

Keywords

Carbon embedding
FCVA
FePt
magnetic media

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2011.2170826

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title = "A novel approach of carbon embedding in magnetic media for future head/disk interface",

abstract = "A novel method of carbon embedding (≤1 nm) is used as a surface modification technique to produce overcoat free media surfaces. The filtered cathodic vacuum arc technique at ion energy of 90 eV is used to embed carbon in the top surface of a ∼25 nm iron/platinum (FePt) film. Transport of ions in matter (TRIM) simulations and X-ray photoelectron spectroscopy (XPS) are used to study carbon embedding profiles and surface chemical composition. XPS results show that carbon embedding is effective in improving the oxidation resistance of FePt. Conductive atomic force microscopy (CAFM) is done on samples after exposure to a 780 nm IR laser with an effective output power of 40 mW to study the thermal stability. No change in the conductivity is observed in the case of carbon embedded FePt surface. Ball-on-disk tribological tests are conducted at a contact pressure of 0.26 GPa on bare and modified FePt surfaces. It is observed that the coefficient of friction is reduced considerably from a value of approximately 0.8 to ∼0.27 after the surface modification.",

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AU - Yang, Hyunsoo

AU - Sinha, Sujeet Kumar

AU - Bogy, David B.

AU - Bhatia, Charanjit Singh

N1 - Funding Information: This work was supported by the Singapore NRF under CRP Award No. NRF-CRP 4-2008-06, the Computer Mechanics Laboratory at UC Berkeley, CA.

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N2 - A novel method of carbon embedding (≤1 nm) is used as a surface modification technique to produce overcoat free media surfaces. The filtered cathodic vacuum arc technique at ion energy of 90 eV is used to embed carbon in the top surface of a ∼25 nm iron/platinum (FePt) film. Transport of ions in matter (TRIM) simulations and X-ray photoelectron spectroscopy (XPS) are used to study carbon embedding profiles and surface chemical composition. XPS results show that carbon embedding is effective in improving the oxidation resistance of FePt. Conductive atomic force microscopy (CAFM) is done on samples after exposure to a 780 nm IR laser with an effective output power of 40 mW to study the thermal stability. No change in the conductivity is observed in the case of carbon embedded FePt surface. Ball-on-disk tribological tests are conducted at a contact pressure of 0.26 GPa on bare and modified FePt surfaces. It is observed that the coefficient of friction is reduced considerably from a value of approximately 0.8 to ∼0.27 after the surface modification.

AB - A novel method of carbon embedding (≤1 nm) is used as a surface modification technique to produce overcoat free media surfaces. The filtered cathodic vacuum arc technique at ion energy of 90 eV is used to embed carbon in the top surface of a ∼25 nm iron/platinum (FePt) film. Transport of ions in matter (TRIM) simulations and X-ray photoelectron spectroscopy (XPS) are used to study carbon embedding profiles and surface chemical composition. XPS results show that carbon embedding is effective in improving the oxidation resistance of FePt. Conductive atomic force microscopy (CAFM) is done on samples after exposure to a 780 nm IR laser with an effective output power of 40 mW to study the thermal stability. No change in the conductivity is observed in the case of carbon embedded FePt surface. Ball-on-disk tribological tests are conducted at a contact pressure of 0.26 GPa on bare and modified FePt surfaces. It is observed that the coefficient of friction is reduced considerably from a value of approximately 0.8 to ∼0.27 after the surface modification.

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A novel approach of carbon embedding in magnetic media for future head/disk interface

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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