Nanostructure and magnetic properties of highly (001) oriented L1 0 (Fe 49Pt 51) 1-xCu x films

M. L. Yan; Y. F. Xu; D. J. Sellmyer

doi:10.1063/1.2164428

Nanostructure and magnetic properties of highly (001) oriented L1 ₀ (Fe ₄₉Pt ₅₁) _1-xCu _x films

M. L. Yan, Y. F. Xu, D. J. Sellmyer

Physics and Astronomy

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

53 Scopus citations

Abstract

We report on nonepitaxially grown L 10 Cu-alloyed FePt thin films with strong (001) texture. The FePt films with different Cu contents were deposited directly on Si wafers with a Fe49 Pt51 Cu multilayer structure. The Cu content was varied from 0 to 13 at. %. All films were annealed at 600 °C for 5 min. X-ray-diffraction characterization showed that only one set of L 10 diffraction peaks appeared and no elemental Cu diffraction peaks were visible. This result, along with a varying ca lattice-parameter ratio, suggests that Cu substitutes Fe or Pt in the L 10 lattice and ternary FePtCu alloy films are formed. (001) texture was enhanced with the increase of Cu content. Transmission electron microscope images showed that the grain size of FePtCu was about 10 nm. For FePt film with 11 at. % Cu substitution, coercivity was about 5 kOe, which is suitable for writing in a practical perpendicular-recording film.

Original language	English (US)
Article number	08G903
Journal	Journal of Applied Physics
Volume	99
Issue number	8
DOIs	https://doi.org/10.1063/1.2164428
State	Published - 2006

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Nanostructure and magnetic properties of highly (001) oriented L1 0 (Fe 49Pt 51) 1-xCu x films",

abstract = "We report on nonepitaxially grown L 10 Cu-alloyed FePt thin films with strong (001) texture. The FePt films with different Cu contents were deposited directly on Si wafers with a Fe49 Pt51 Cu multilayer structure. The Cu content was varied from 0 to 13 at. %. All films were annealed at 600 °C for 5 min. X-ray-diffraction characterization showed that only one set of L 10 diffraction peaks appeared and no elemental Cu diffraction peaks were visible. This result, along with a varying ca lattice-parameter ratio, suggests that Cu substitutes Fe or Pt in the L 10 lattice and ternary FePtCu alloy films are formed. (001) texture was enhanced with the increase of Cu content. Transmission electron microscope images showed that the grain size of FePtCu was about 10 nm. For FePt film with 11 at. % Cu substitution, coercivity was about 5 kOe, which is suitable for writing in a practical perpendicular-recording film.",

author = "Yan, {M. L.} and Xu, {Y. F.} and Sellmyer, {D. J.}",

note = "Funding Information: The authors would like to thank Dr. Xingzhong Li and Dr. Langping Yue for assistance and analysis of TEM and MFM images. This research was supported by DOE, NSF-MRSEC, INSIC, W. M. Keck Foundation, and CMRA. ",

year = "2006",

doi = "10.1063/1.2164428",

language = "English (US)",

volume = "99",

journal = "Journal of Applied Physics",

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T1 - Nanostructure and magnetic properties of highly (001) oriented L1 0 (Fe 49Pt 51) 1-xCu x films

AU - Yan, M. L.

AU - Xu, Y. F.

AU - Sellmyer, D. J.

N1 - Funding Information: The authors would like to thank Dr. Xingzhong Li and Dr. Langping Yue for assistance and analysis of TEM and MFM images. This research was supported by DOE, NSF-MRSEC, INSIC, W. M. Keck Foundation, and CMRA.

PY - 2006

Y1 - 2006

N2 - We report on nonepitaxially grown L 10 Cu-alloyed FePt thin films with strong (001) texture. The FePt films with different Cu contents were deposited directly on Si wafers with a Fe49 Pt51 Cu multilayer structure. The Cu content was varied from 0 to 13 at. %. All films were annealed at 600 °C for 5 min. X-ray-diffraction characterization showed that only one set of L 10 diffraction peaks appeared and no elemental Cu diffraction peaks were visible. This result, along with a varying ca lattice-parameter ratio, suggests that Cu substitutes Fe or Pt in the L 10 lattice and ternary FePtCu alloy films are formed. (001) texture was enhanced with the increase of Cu content. Transmission electron microscope images showed that the grain size of FePtCu was about 10 nm. For FePt film with 11 at. % Cu substitution, coercivity was about 5 kOe, which is suitable for writing in a practical perpendicular-recording film.

AB - We report on nonepitaxially grown L 10 Cu-alloyed FePt thin films with strong (001) texture. The FePt films with different Cu contents were deposited directly on Si wafers with a Fe49 Pt51 Cu multilayer structure. The Cu content was varied from 0 to 13 at. %. All films were annealed at 600 °C for 5 min. X-ray-diffraction characterization showed that only one set of L 10 diffraction peaks appeared and no elemental Cu diffraction peaks were visible. This result, along with a varying ca lattice-parameter ratio, suggests that Cu substitutes Fe or Pt in the L 10 lattice and ternary FePtCu alloy films are formed. (001) texture was enhanced with the increase of Cu content. Transmission electron microscope images showed that the grain size of FePtCu was about 10 nm. For FePt film with 11 at. % Cu substitution, coercivity was about 5 kOe, which is suitable for writing in a practical perpendicular-recording film.

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Nanostructure and magnetic properties of highly (001) oriented L1 ₀ (Fe ₄₉Pt ₅₁) _1-xCu _x films

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