skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Advantageous use of metallic cobalt in the target for pulsed laser deposition of cobalt-doped ZnO films

Authors:
; ; ; ; ; ORCiD logo;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1297264
Grant/Contract Number:
AC02-06CH11357
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 7; Related Information: CHORUS Timestamp: 2016-12-26 03:13:26; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics
Country of Publication:
United States
Language:
English

Citation Formats

Ying, Minju, Blythe, Harry J., Dizayee, Wala, Heald, Steve M., Gerriu, Fatma M., Fox, A. Mark, and Gehring, Gillian A.. Advantageous use of metallic cobalt in the target for pulsed laser deposition of cobalt-doped ZnO films. United States: N. p., 2016. Web. doi:10.1063/1.4961223.
Ying, Minju, Blythe, Harry J., Dizayee, Wala, Heald, Steve M., Gerriu, Fatma M., Fox, A. Mark, & Gehring, Gillian A.. Advantageous use of metallic cobalt in the target for pulsed laser deposition of cobalt-doped ZnO films. United States. doi:10.1063/1.4961223.
Ying, Minju, Blythe, Harry J., Dizayee, Wala, Heald, Steve M., Gerriu, Fatma M., Fox, A. Mark, and Gehring, Gillian A.. 2016. "Advantageous use of metallic cobalt in the target for pulsed laser deposition of cobalt-doped ZnO films". United States. doi:10.1063/1.4961223.
@article{osti_1297264,
title = {Advantageous use of metallic cobalt in the target for pulsed laser deposition of cobalt-doped ZnO films},
author = {Ying, Minju and Blythe, Harry J. and Dizayee, Wala and Heald, Steve M. and Gerriu, Fatma M. and Fox, A. Mark and Gehring, Gillian A.},
abstractNote = {},
doi = {10.1063/1.4961223},
journal = {Applied Physics Letters},
number = 7,
volume = 109,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1063/1.4961223

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

Save / Share:
  • We investigate the magnetic properties of ZnCoO thin films grown by pulsed laser deposition (PLD) from targets made containing metallic Co or CoO precursors instead of the usual Co{sub 3}O{sub 4}. We find that the films grown from metallic Co precursors in an oxygen rich environment contain negligible amounts of Co metal and have a large magnetization at room temperature. Structural analysis by X-ray diffraction and magneto-optical measurements indicate that the enhanced magnetism is due, in part, from Zn vacancies that partially compensate the naturally occurring n-type defects. We conclude that strongly magnetic films of Zn{sub 0.95}Co{sub 0.05}O that domore » not contain metallic cobalt can be grown by PLD from Co-metal-precursor targets if the films are grown in an oxygen atmosphere.« less
  • Highly oriented rutile and anatase TiO{sub 2}:Co films have been grown on sapphire and SrTiO{sub 3} substrates by pulsed laser deposition with Co concentrations of 3% and 12%. All films are transparent with optical gaps >3 eV and show ferromagnetic behavior where the moment per Co ranges from 0.27 mu{sub B} to 1.2 mu{sub B}. The resistivity shows activated behavior where the activation energy ranges from 67 meV to 79 meV. Our results are consistent with other reports on dilute ferromagnetic TiO{sub 2}:Co films prepared under similar growth conditions.
  • We heteroepitaxially grew cobalt-doped BaFe{sub 2}As{sub 2} films on (La,Sr)(Al,Ta)O{sub 3} single-crystal substrates by pulsed laser deposition using four different wavelengths and investigated how the excitation wavelength and pulse energy affected growth. Using the tilting and twisting angles of X-ray diffraction rocking curves, we quantitatively analyzed the crystallinity of each film. We found that the optimal deposition rate, which could be tuned by pulse energy, was independent of laser wavelength. The high-quality film grown at the optimal pulse energy (i.e., the optimum deposition rate) exhibited high critical current density over 1 MA/cm{sup 2} irrespective of the laser wavelength.
  • Thin films of ZnO doped with manganese were deposited by double-beam, combinatorial pulsed laser deposition. The laser-induced plasmas were studied by means of fast photography and using a Langmuir probe, whereas the films were analyzed by x-ray-diffraction and energy-dispersive x-ray spectroscopy. The effect of the relative delay between plasma plumes on the characteristics of the films was analyzed. It was found that using this parameter, it is possible to control the dopant content keeping the oriented wurtzite structure of the films. The minimum content of Mn was found for plume delays between 0 and 10 {mu}s as the interaction betweenmore » plasmas scatters the dopant species away from the substrate, thus reducing the incorporation of Mn into the films. Results suggest that for delays shorter than {approx}100 {mu}s, the expansion of the second plume through the region behind the first plume affects the composition of the film.« less