Nanoscale surface modification of La0.7Sr0.3MnO3 thin films

Liu, Y.; Monsen, Å. F.; Boschker, J. E.; Wahlström, E.; Borg, A.; Tybell, T.

doi:doi:10.1116/1.3368465

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Journal of Vacuum Science & Technology B / Volume 28 / Issue 2 / Regular Articles

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J. Vac. Sci. Technol. B 28, 407 (2010); http://dx.doi.org/10.1116/1.3368465 (4 pages)

Nanoscale surface modification of La_0.7Sr_0.3MnO₃ thin films

Y. Liu¹, Å. F. Monsen¹, J. E. Boschker², E. Wahlström¹, A. Borg¹, and T. Tybell²

¹Department of Physics, Norwegian University of Science and Technology, 7491 Trondheim, Norway
²Department of Electronics and Telecommunications, Norwegian University of Science and Technology, 7491 Trondheim, Norway

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(Published online 30 March 2010)

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Nanoscale three-dimensional (3D) surface modifications, by scanning tunneling microscopy under ambient conditions, of La_0.7Sr_0.3MnO₃ thin films have been performed. It was demonstrated that there are well-defined combinations of bias voltages, tunneling current, and scan speeds which allow for controlled surface structuring. Lateral structures with sizes down to 1.5 nm are possible to obtain. Moreover, it is possible to reproducibly control the depth of etching with half a unit cell precision, enabling design of 3D surface structures and control of the surface termination of La_0.7Sr_0.3MnO₃ through etching.

ACKNOWLEDGMENTS

This project was supported by the Norwegian Research Council under the NANOMAT nationally coordinated project, Project No. 158518/431, and under project numbers 162874 and 10239707. C. C. You is acknowledged for technical assistance.

Article Outline

INTRODUCTION
EXPERIMENT
RESULTS AND DISCUSSION
CONCLUSIONS

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KEYWORDS and PACS

Keywords

etching, lanthanum compounds, nanostructured materials, scanning tunnelling microscopy, strontium compounds, thin films, SrRu03, SrTiO3

PACS

81.07.Bc

Nanocrystalline materials
81.65.Cf

Surface cleaning, etching, patterning
68.35.B-

Structure of clean surfaces (and surface reconstruction)
68.37.Ef

Scanning tunneling microscopy (including chemistry induced with STM)

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History

Received 20 November 2009
Accepted 22 February 2010
Published online 30 March 2010

Digital Object Identifier

http://dx.doi.org/10.1116/1.3368465

PUBLICATION DATA

ISSN

1071-1023 (print)

1520-8567 (online)

Publisher

American Vacuum Society

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