Study of effects of annealing on nanostructured Co-C thin films by X-ray absorption spectroscopy

C. J. Sun; G. M. Chow; Y. Zhao; Y. K. Hwu; Jianping Wang

doi:10.1016/j.jmmm.2006.01.055

Study of effects of annealing on nanostructured Co-C thin films by X-ray absorption spectroscopy

C. J. Sun, G. M. Chow, Y. Zhao, Y. K. Hwu, Jianping Wang

Electrical and Computer Engineering

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

Abstract

The long-range order and the extent of crystallization of nanostructured thin films may not be reliably obtained by conventional X-ray diffraction when the crystalline domain size is smaller than the X-ray coherent length. Here we report an investigation of the effects of annealing on Co-C thin films by X-ray absorption spectroscopy. The local atomic order of Co increased with increasing annealing temperature, resulting in the increase of coercivity and saturation magnetization. The Co-C films annealed at 400 °C dominated by hexagonal close-packed phase with optimized magnetic properties are a promising media candidate for high density magnetic recording.

Original language	English (US)
Pages (from-to)	e383-e386
Journal	Journal of Magnetism and Magnetic Materials
Volume	303
Issue number	2 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.jmmm.2006.01.055
State	Published - Aug 2006

Bibliographical note

Funding Information:
G.M.C. thanks the support of this work by the NUS Academic Research Grant and the Office of Naval Research, USA. C.J.S. is supported by a NUS research fellowship. Y. Zhao was supported by the NUS postgraduate research scholarship. The authors thank NSRRC for the beamtime, and the staff of the wiggler 17C beamline for the assistance of the data collection.

Keywords

Extended X-ray absorption fine structure
Magnetic recording
Spin moment
Thin films
X-ray absorption fine structure

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title = "Study of effects of annealing on nanostructured Co-C thin films by X-ray absorption spectroscopy",

abstract = "The long-range order and the extent of crystallization of nanostructured thin films may not be reliably obtained by conventional X-ray diffraction when the crystalline domain size is smaller than the X-ray coherent length. Here we report an investigation of the effects of annealing on Co-C thin films by X-ray absorption spectroscopy. The local atomic order of Co increased with increasing annealing temperature, resulting in the increase of coercivity and saturation magnetization. The Co-C films annealed at 400 °C dominated by hexagonal close-packed phase with optimized magnetic properties are a promising media candidate for high density magnetic recording.",

keywords = "Extended X-ray absorption fine structure, Magnetic recording, Spin moment, Thin films, X-ray absorption fine structure",

author = "Sun, {C. J.} and Chow, {G. M.} and Y. Zhao and Hwu, {Y. K.} and Jianping Wang",

note = "Funding Information: G.M.C. thanks the support of this work by the NUS Academic Research Grant and the Office of Naval Research, USA. C.J.S. is supported by a NUS research fellowship. Y. Zhao was supported by the NUS postgraduate research scholarship. The authors thank NSRRC for the beamtime, and the staff of the wiggler 17C beamline for the assistance of the data collection.",

year = "2006",

month = aug,

doi = "10.1016/j.jmmm.2006.01.055",

language = "English (US)",

volume = "303",

pages = "e383--e386",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "2 SPEC. ISS.",

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T1 - Study of effects of annealing on nanostructured Co-C thin films by X-ray absorption spectroscopy

AU - Sun, C. J.

AU - Chow, G. M.

AU - Zhao, Y.

AU - Hwu, Y. K.

AU - Wang, Jianping

N1 - Funding Information: G.M.C. thanks the support of this work by the NUS Academic Research Grant and the Office of Naval Research, USA. C.J.S. is supported by a NUS research fellowship. Y. Zhao was supported by the NUS postgraduate research scholarship. The authors thank NSRRC for the beamtime, and the staff of the wiggler 17C beamline for the assistance of the data collection.

PY - 2006/8

Y1 - 2006/8

N2 - The long-range order and the extent of crystallization of nanostructured thin films may not be reliably obtained by conventional X-ray diffraction when the crystalline domain size is smaller than the X-ray coherent length. Here we report an investigation of the effects of annealing on Co-C thin films by X-ray absorption spectroscopy. The local atomic order of Co increased with increasing annealing temperature, resulting in the increase of coercivity and saturation magnetization. The Co-C films annealed at 400 °C dominated by hexagonal close-packed phase with optimized magnetic properties are a promising media candidate for high density magnetic recording.

AB - The long-range order and the extent of crystallization of nanostructured thin films may not be reliably obtained by conventional X-ray diffraction when the crystalline domain size is smaller than the X-ray coherent length. Here we report an investigation of the effects of annealing on Co-C thin films by X-ray absorption spectroscopy. The local atomic order of Co increased with increasing annealing temperature, resulting in the increase of coercivity and saturation magnetization. The Co-C films annealed at 400 °C dominated by hexagonal close-packed phase with optimized magnetic properties are a promising media candidate for high density magnetic recording.

KW - Extended X-ray absorption fine structure

KW - Magnetic recording

KW - Spin moment

KW - Thin films

KW - X-ray absorption fine structure

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DO - 10.1016/j.jmmm.2006.01.055

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 2 SPEC. ISS.

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