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Dynamic force microscopy study of the microstructural evolution of pulsed laser deposited ultrathin Ni and Ag films

Published online by Cambridge University Press:  31 January 2011

Prashant Kumar ,
M. Ghanashyam Krishna ,
A.K. Bhatnagar  and
A.K. Bhattacharya
Prashant Kumar
Affiliation:
School of Physics, University of Hyderabad, Hyderabad-500046, India
M. Ghanashyam Krishna*
Affiliation:
School of Physics, University of Hyderabad, Hyderabad-500046, India; and Department of Engineering Sciences, Oxford University, Oxford OX1 3PJ, United Kingdom
A.K. Bhatnagar
Affiliation:
School of Physics, University of Hyderabad, Hyderabad-500046, India
A.K. Bhattacharya
Affiliation:
Department of Engineering Sciences, Oxford University, Oxford OX1 3PJ, United Kingdom
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Ultrathin films (6–10 nm) of silver and nickel were deposited by pulsed laser deposition (PLD) in high vacuum (1 × 10−6 mbar). Microstructural evolution of these films as function of incident laser energy, substrate temperature, substrate material [borosilicate glass, fused silica, MgO(100) and Si (311)] and target–substrate distance was studied in detail using dynamic force microscopy. It is shown that with increase in laser energy incident on the target, there is a substantial increase in particle size in the film. The effect of increased laser energy on microstructure is much more drastic than that for the increase of substrate temperature. In general, denser packing of nanoparticles and increased clustering have been observed at elevated substrate temperature. Increase in laser energy gives rise to higher average grain size, packing density, and clustering in comparison to substrate temperature. It is observed that the aspect ratio of grains is dependent on incident laser fluence and substrate temperature, but more drastically on the substrate material. Substrate coverage and aspect ratio of the grains are particularly dependent on the nature of crystallinity of the substrates. It is demonstrated that PLD provides a greater degree of microstructural manipulation than other physical vapor deposition techniques.

Keywords

FilmLaser ablationScanning-probe microscopy (SPM)
Type
Articles
Information
Journal of Materials Research , Volume 23 , Issue 7 , July 2008 , pp. 1826 - 1839
Copyright
Copyright © Materials Research Society 2008

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References

REFERENCES

1Norton, D.P.: in Pulsed Laser Deposition of Thin Film Applications Led Growth of Functional Materials edited by R. Eason Wiley-Interscience Hoboken, NJ 2007 Chap. 1 3Google Scholar
2Shena, J., Gai, Z.Kirschner, J.: Growth and magnetism of metallic thin films and multilayers by pulsed-laser deposition. Surf. Sci. Rep. 52, 163 2004CrossRefGoogle Scholar
3Jackson, T.J.Palmer, S.B.: Oxide superconductor and magnetic metal thin film deposition by pulsed laser ablation: A review. J. Phys. D: Appl. Phys. 27, 1581 1994CrossRefGoogle Scholar
4Magdalena, K.C., Chmielowski, R., Kopia, A., Kusinski, J., Villain, S., Leroux, C.Gavarri, J-R.: Multiphase CuO–CeO thin films by pulsed laser deposition technique: Experimental texture evolutions and kinetics modeling. Thin Solid Films 458, 98 2004Google Scholar
5Venkatesan, T.Green, S.M.: Pulsed laser deposition: Thin films in a flash. The Industrial Physicist 2, 22 1996Google Scholar
6Warrender, J.M.Aziz, M.J.: Evolution of Ag nanocrystal films grown by pulsed laser deposition. Appl. Phys. A 79, 713 2004CrossRefGoogle Scholar
7Henley, S.J., Carey, J.D.Silva, S.R.P.: Pulsed-laser-induced nanoscale island formation in thin metal-on-oxide films. Phys. Rev. B: Condens. Matter 72, 195408 2005CrossRefGoogle Scholar
8Donnelly, T., Doggett, B.Lunney, J.G.: Pulsed laser deposition of nanostructured Ag films. Appl. Surf. Sci. 252, 4445 2006CrossRefGoogle Scholar
9Jang, D.Kim, D.: Synthesis of nanoparticles by pulsed laser ablation of consolidated metal microparticles. Appl. Phys. A 79, 1985 2004CrossRefGoogle Scholar
10So, S.K., Fong, H.H., Yeung, C.F.Cheunga, N.H.: Transmittance and resistivity of semicontinuous copper films prepared by pulsed-laser deposition. Appl. Phys. Lett. 77, 1099 2000CrossRefGoogle Scholar
11Phipps, C.R., Turner, T.P., Harrison, R.F., York, G.W., Osborne, W.S., Anderson, G.K., Corlis, X.F., Haynes, L.C., Steele, H.S., Spicochi, K.C.King, T.R.: Impulse coupling to targets in vacuum by KrF, HF, and CO2 single-pulse lasers. J. Appl. Phys. 64, 1083 1988CrossRefGoogle Scholar
12Krebs, H.U.Bremert, O.: Pulsed laser deposition of thin metallic alloys. Appl. Phys. Lett. 62, 2341 1993CrossRefGoogle Scholar
13Krebs, H.U.: Characteristic properties of laser deposited metallic systems. J. Non-Equilibrium Proc. 10, 3 1997Google Scholar
14Fahler, S.Krebs, H.U.: Calculations and experiments of material removal and kinetic energy during pulsed laser ablation of metals. Appl. Surf. Sci. 96, 61 1996CrossRefGoogle Scholar
15Lunney, J.: Pulsed laser deposition of metal and metal multilayer films. Appl. Surf. Sci. 86, 79 1995CrossRefGoogle Scholar
16Demtraoder, W.Jantz, W.: Investigation of laser-produced plasmas from metal surfaces. Plasma Phys. 12, 691 1970CrossRefGoogle Scholar
17Neugebauer, C.A.: Condensation, nucleation and growth of thin films in Handbook of Thin Film Technology edited by L.I. Maissel and R. Glang McGraw Hill New York 1970 Chap. 8 8.3Google Scholar