Skip to main content Accessibility help
×
Home

HRTEM and EELS Studies of Py/Al and Co/Al Multilayers

Published online by Cambridge University Press:  21 March 2011

Jiaming Zhang
Affiliation:
Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, 48824
Martin A. Crimp
Affiliation:
Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, MI, 48824
N. Theodoropoulou
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824
A. Sharma
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824
R. Loloee
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824
W. P. Pratt
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824
J. Bass
Affiliation:
Department of Physics and Astronomy, Michigan State University, East Lansing, MI, 48824
Get access

Abstract

Ferromagnetic/non-magnetic (F/N) metallic multilayers in the Current-Perpendicular-to-Plane (CPP) geometry show giant Magnetoresistance (MR) and are promising candidates for potential use in high density storage devices. F/Al interfaces were recently shown to have large interface specific resistances that enhance the CPP-resistance. However, the CPP resistances showed instability over time at room temperature and also upon annealing to 453K. To help understand both the large interface specific resistances and their instabilities, we have undertaken cross-sectional High Resolution Transmission Electron Microscopy (HRTEM) and Electron Energy Loss Spectroscopy (EELS) studies of both as-sputtered and annealed Py/Al and Co/Al multilayers. We find well-layered, but rough structures with local F/Al interfaces being tilted up to ˜15°from the plane perpendicular to the growth direction. HRTEM images appear to show diffuse interfaces, but a through-focus series of images suggests considerable grain overlap in the electron beam direction, thereby complicating interpretation. This combination of HRTEM imaging and EELS analysis suggests that any interfacial mixing is limited in scale, and shows no evidence of intermetallic compound formation. No obvious differences are seen between assputtered and annealed samples.

Type
Research Article
Copyright
Copyright © Materials Research Society 2007

Access options

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

References

1. Theodoropoulou, N., Sharma, A., Loloee, R., Pratt, W.P. Jr, Bass, J., Fert, A., and Jaffres, H, J. Appl. Phys. 99, 08G502 (2006)CrossRefGoogle Scholar
2. Theodoropoulou, N., Sharma, A. Haillard, T., Loloee, R., Pratt, W.P. Jr, Bass, J., Zhang, J. and Crimp, M.A., IEEE Transactions on Magnetics (in press)Google Scholar
3. Massalski, T.B., Okamoto, H., Subramanian, P.R., and Kacprzak, L., Binary alloy phase diagrams. Vol.2. 1990, Metals Park, OH: ASM International.Google Scholar
4. Vovk, V., Schmitz, G., and Kirchheim, R., Phys. Rev. B 69, 104102 (2004).CrossRefGoogle Scholar
5. Lee, S.F. et al., Phys. Rev. B 52, 15426 (1995).CrossRefGoogle Scholar
6. Dang, K. Le, Veillet, P., Vélu, E., Parkin, S. S. P., and Chappert, C., Appl. Phys. Lett. 63, 108 (1993).CrossRefGoogle Scholar
7. Ahn, C. C., Transmission Electron Energy Loss Spectrometry in Materials Science and the EELS ATALS, 2nd ed. (WILEY-VCH, 2004).CrossRefGoogle Scholar

Full text views

Full text views reflects PDF downloads, PDFs sent to Google Drive, Dropbox and Kindle and HTML full text views.

Total number of HTML views: 0
Total number of PDF views: 10 *
View data table for this chart

* Views captured on Cambridge Core between September 2016 - 26th January 2021. This data will be updated every 24 hours.

Hostname: page-component-898fc554b-wphb9 Total loading time: 0.473 Render date: 2021-01-26T19:41:00.930Z Query parameters: { "hasAccess": "0", "openAccess": "0", "isLogged": "0", "lang": "en" } Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": false, "newCiteModal": false }

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.

HRTEM and EELS Studies of Py/Al and Co/Al Multilayers
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.

HRTEM and EELS Studies of Py/Al and Co/Al Multilayers
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.

HRTEM and EELS Studies of Py/Al and Co/Al Multilayers
Available formats
×
×

Reply to: Submit a response


Your details


Conflicting interests

Do you have any conflicting interests? *