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Title: Oriented growth of CoPt nanoparticles by pulsed laser deposition
Authors: Pan, Z.Y.
Rawat, R.S.
Lin, J.J. 
Mahmood, S.
Ramanujan, R.V.
Lee, P.
Springham, S.V.
Tan, T.L.
Keywords: CoPt nanoparticles
Oriented growth
Pulsed laser deposition
Issue Date: Dec-2010
Citation: Pan, Z.Y., Rawat, R.S., Lin, J.J., Mahmood, S., Ramanujan, R.V., Lee, P., Springham, S.V., Tan, T.L. (2010-12). Oriented growth of CoPt nanoparticles by pulsed laser deposition. Applied Physics A: Materials Science and Processing 101 (4) : 609-613. ScholarBank@NUS Repository.
Abstract: The magnetic nanoparticles of Fe/FeCo/FePt, in the past, in a PLD system were grown by us using argon ambient gas pressure of about 0.1-75.0 mbar, as the ambient gas pressure can be used to tune the energy of the incident plasma plume species, the expansion volume, the growth duration, etc. which can control the particle size. In present paper, we report the direct synthesis of small-sized nanoparticles even when no ambient gas was used, with the experiments being done in higher vacuum of about 10-5 mbar in PLD chamber. The deposition rate under vacuum condition is significantly higher than the deposition rate at high ambient pressure. The study of inplane and outplane magnetic properties, along with XRD results, confirmed that the as-deposited CoPt nanoparticles thin film has oriented growth. The as-deposited CoPt nanoparticles are in magnetically soft fcc phase and a post deposition annealing at 600°C resulted in phase transition to magnetically hard fct phase. © 2010 Springer-Verlag.
Source Title: Applied Physics A: Materials Science and Processing
ISSN: 09478396
DOI: 10.1007/s00339-010-5937-0
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