jap banner
  • Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

Flickr Twitter UniPHY Group iResearch App Facebook

Journal of Applied Physics / Volume 111 / Issue 7 / PROCEEDINGS OF THE 56TH ANNUAL CONFERENCE ON MAGNETISM AND MAGNETIC MATERIALS / Soft Magnetic Materials

J. Appl. Phys. 111, 07A303 (2012); http://dx.doi.org/10.1063/1.3670511 (3 pages)

Structural studies of high-Ku metastable CoPt thin films with long-range order

Fu-Te Yuan1, Jen-Hwa Hsu1, Yi-Hung Lin2, S. N. Hsiao3, and H. Y. Lee3

1Institute of Applied Physics and Department of Physics, National Taiwan University, Taipei, 106, Taiwan
2Department of Materials Science and Engineering, National Taiwan University, Taipei, 106, Taiwan
3National Synchrotron Radiation Research Center (NSRRC), Hsinchu, 300, Taiwan

View MapView Map

(Received 8 September 2011; accepted 12 October 2011; published online 8 February 2012)

The symmetries of CoPt thin films in different phases, including disordered A1, ordered L11, and L10 were examined by making measurements along the (10.1) diffraction rod. The films were deposited by sputtering on MgO(111) substrates at different temperatures (Ta). The stacking sequence of close-packed atomic planes in 50 nm-thick samples with Ta ≥ 200 °C was identified as ABCABC, indicating that the distribution of defects in the film was random, so the symmetry was preserved with increasing Ta. In the RT-prepared film, a considerable amount of (∼62.9 vol.%) disordered CoPt with hexagonal symmetry was detected, vanishing as Ta increased. Defect-induced modification of symmetry was observed in the L11 film as its thickness was reduced to 10 nm. A pseudo-hcp component of around 7.1 vol.% was present in the film, as a result of the periodic distribution of defects. The defects in the structure may also explain the broadened magnetic alignment.

© 2012 American Institute of Physics

KEYWORDS, PACS, and IPC

Keywords

cobalt alloys, high-k dielectric thin films, long-range order, metallic thin films, platinum alloys, sputter deposition

PACS

  • 68.55.Ln

    Defects and impurities: doping, implantation, distribution, concentration, etc.

  • 81.15.Cd

    Deposition by sputtering

  • 77.55.F-

    High-permittivity capacitive films

International Patent Classification (IPC)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3670511

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    J. C. A. Huang, A. C. Hsu, Y. H. Lee, T. H. Wu, and C. H. Lee, J. Appl. Phys. 85, 5977 (1999)JAPIAU000085000008005977000001.

    H. Sato, T. Shimatsu, Y. Okazaki, H. Muraoka, H. Aoi, S. Okamoto, and O. Kitakami, J. Appl. Phys. 103, 07E114 (2008)JAPIAU00010300000707E114000001.

    F. T. Yuan, A. C. Sun, J. K. Mei, W. M. Liao, J. H. Hsu, and H. Y. Lee, J. Appl. Phys. 109, 07B743 (2011)JAPIAU00010900000707B743000001.

    Y. Yang, J. S. Chen, and G. M. Chow, J. Appl. Phys. 109, 07B744 (2011)JAPIAU00010900000707B744000001.

    F. T. Yuan, A. C. Sun, J. H. Hsu, C. S. Tan, P. C. Kuo, W. M. Liao, and H. Y. Lee, J. Appl. Phys. 108, 113909 (2010)JAPIAU000108000011113909000001.

    A. Hashimoto, S. Saito, N. Itagaki, and M. Takahashi, Appl. Phys. Lett. 89, 262508 (2006)APPLAB000089000026262508000001.

    S. Hinata, R. Yanagisawa, S. Saito, and M. Takahashi, J. Appl. Phys. 105, 07B718 (2009)JAPIAU00010500000707B718000001.

    G. R. Harp, D. Weller, T. A. Rabedeau, R. F. C. Farrow, and M. F. Toney, Phys. Rev. Lett. 71, 2493 (1993).


Figures (5)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Google Calendar

ADVERTISEMENT

Your Recent History Recent History Help

Recently Viewed

  1. Structural studies of high-Ku metastable CoPt thin films with long-range order
  2. Domain structure and magnetization loss in a toroidal core based on an Fe-based amorphous alloy
  3. Effect of P addition on nanocrystallization and high temperature magnetic properties of low B and Nb containing FeCo nanocomposites
  4. The effect of In-flush on the optical anisotropy of InAs/GaAs quantum dots
  5. Polarization-independent negative refraction effect in SiO2-GaAs annular photonic crystals
Go to AIP Home
Copyright © American Institute of Physics
close