Skip to main content Accessibility help
×
Home
Hostname: page-component-79b67bcb76-c5xhk Total loading time: 0.335 Render date: 2021-05-16T16:11:38.675Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true }

Above Room-Temperature Ferromagnetism in GaN Powders by Calcinations with CuO

Published online by Cambridge University Press:  01 February 2011

Lori Noice
Affiliation:
noice@pdx.edu, Portland State University, Department of Physics, Portland State University, P.O.Box 751, Portland, OR, 97207-0751, United States, 503-725-4248
Bjoern Seipel
Affiliation:
bseipel@pdx.edu, Portland State University, Department of Physics, Portland State University, P.O.Box 751, Portland, OR, 97207-0751, United States
Rolf Erni
Affiliation:
Rolf.Erni@nl.feico.com, University of California at Davis, Department of Chemical Engineering and Materials Science, University of California at Davis, One Shields Avenue, Davis, CA, 95616, United States
Amita Gupta
Affiliation:
amitag@kth.se, The Royal Institute of Technology, Department of Materials Science, Tmfy-MSE, The Royal Institute of Technology, Brinellvägen 23, Rm 224, SE 100 44, Stockholm, N/A, N/A, Sweden
Chunfei Li
Affiliation:
chunfei@pdx.edu, Portland State University, Department of Physics, Portland State University, P.O.Box 751, Portland, OR, 97207-0751, United States
peter Moeck
Affiliation:
pmoeck@pdx.edu, Portland State University, Department of Physics, Portland State University, P.O.Box 751, Portland, OR, 97207-0751, United States
Venkat Rao
Affiliation:
rao@kth.se, The Royal Institute of Technology, Department of Materials Science, Tmfy-MSE, The Royal Institute of Technology, Brinellvägen 23, Rm 224, SE 100 44, Stockholm, N/A, N/A, Sweden
Nigel Browning
Affiliation:
nbrowning@ucdavis.edu, University of California at Davis, Department of Chemical Engineering and Materials Science, University of California at Davis, One Shields Avenue, Davis, CA, 95616, United States
Get access

Abstract

Gallium nitride powders were calcined with copper oxide in either air or N2 and analyzed by means of powder X-ray diffraction (XRD), high-resolution parallel illumination (HRTEM) and scanning probe transmission electron microscopy (STEM), energy dispersive X-ray spectroscopy (EDXS), and electron energy loss spectroscopy (EELS) in order to address the structural and electronic effects of Cu-incorporation into GaN. Gallium oxide and multiple copper oxide phases corresponding to the calcination environment were detected. Significant changes in the lattice parameters and electronic structure of the N2-processed GaN indicate incorporation of both copper and oxygen into the GaN lattice as well as changes in the chemical bonding due to the calcinations process. SQUID magnetometer measurements at 300 K demonstrated ferromagnetism in selected samples.

Type
Research Article
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below.

References

1 Sluiter, M. H. F. et al., “First principles based design and experimental evidence for a ZnO-based ferromagnet at room temperature ”. Physical Review Letters 94(18): 187204 13 (2005).CrossRefGoogle ScholarPubMed
2 Dietl, T., et al., “Zener Model Description of Ferromagnetism in Zinc-Blende Magnetic Semiconductors ”. Science, 2000. 287(5455): p. 10191022.CrossRefGoogle ScholarPubMed
3 Liu, C., et al., “Ferromagnetism of ZnO and GaN: A Review”. Journal of Material Science: Material in Electronics 16(2005)555597 Google Scholar
4 Sharma, P. et al., “Ferromagnetism above room temperature in bulk and transparent thin films of Mn doped ZnO”. Nature Materials 2(10): 673677 (2003).CrossRefGoogle ScholarPubMed
5 Buchholz, D.B., et al., “Room-temperature ferromagnetism in Cu-doped ZnO thin films”. Applied Physics Letters, 2005. 87(8): p. 082504–06.CrossRefGoogle Scholar
6 Seipel, B., et al., “A Structural and Spectroscopic Study on Copper and Oxygen Incorporation into Wurtzite-Type Gallium Nitride”, Physical Review B (submitted)Google Scholar
7 Rodriguez-Carvajal, J., “FULLPROF: A Program for Rietveld Refinement and Pattern Matching Analysis”. Abstracts of the Satellite Meeting on Powder Diffraction of the XV Congress of the IUCr, Toulouse, France, 1990: p. 127.Google Scholar
8 Egerton, R.F., Electron energy-loss spectroscopy in the electron microscope. second ed. ed. 1996, New York: Plenum Press.CrossRefGoogle Scholar
9 Brink, H.A., et al., “A sub-50 meV spectrometer and energy filter for use in combination with 200 kV monochromated (S)TEMs”. Ultramicroscopy, 2003. 96(3-4): p. 367384.CrossRefGoogle ScholarPubMed
10 Erni, R., et al., Analysis of extraterrestrial particles using monochromated electron energy-loss spectroscopy. Micron, 2005. 36(4): p. 369379.CrossRefGoogle ScholarPubMed
11 Kim, J.Y., et al., Reduction of CuO and Cu2O with H2:H embedding and kinetic effects in the formation of suboxides. Journal of the American Chemical Society, 2003. 125(35)CrossRefGoogle ScholarPubMed
12 Owens, Frank, Hunter College, City University of New York, NY, and Army Armament Research, Development and Engineering Center, Picatinny, NJ, USA, private communicationsGoogle Scholar
13 http://laser.phys.ualberta.ca/̃egerton/programs/SIGMAKL-instructions.htm, see also ref. 8.Google Scholar
14 Lazar, S., Hebert, C., and Zandbergen, H.W., Investigation of hexagonal and cubic GaN by high-resolution electron energy-loss spectroscopy and density functional theory. Ultramicroscopy, 2004. 98(2-4): p. 249257.CrossRefGoogle ScholarPubMed

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Above Room-Temperature Ferromagnetism in GaN Powders by Calcinations with CuO
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Above Room-Temperature Ferromagnetism in GaN Powders by Calcinations with CuO
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Above Room-Temperature Ferromagnetism in GaN Powders by Calcinations with CuO
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *