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Title | Observation of the Curie Transition in Palladium Bionanomaterial Using Muon Spin Rotation Spectroscopy |
Authors |
Creamer, N.J.
Macaskie, L.E. Mikheenko, P. Mikheenko, I.P. Cottrell, S.P. Williams, A.R. |
ORCID | |
Keywords |
Nanoparticles Palladium Ferromagnetic Bacteria Muon Spin Rotation Spectroscopy |
Type | Conference Papers |
Date of Issue | 2012 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/35339 |
Publisher | Sumy State University |
License | |
Citation | Observation of the Curie Transition in Palladium Bionanomaterial Using Muon Spin Rotation Spectroscopy / N. J. Creamer, L. E. Macaskie, P. Mikheenko et al. // Nanomaterials: Applications & Properties (NAP-2012) : 2-nd International conference, Alushta, the Crimea, September 17-22, 2012 / Edited by: A. Pogrebnjak. - Sumy : Sumy State University, 2012. - V. 1, No4. - 04MFPN04 |
Abstract |
Palladium bionanomaterial was manufactured using the sulfate-reducing bacterium, Desulfovibrio
desulfuricans, to reduce soluble Pd(II) ions to cell-bound Pd(0). The material was examined using a
Superconducting Quantum Interference Device (SQUID) to observe bulk magnetisation over the
temperature range 10 – 300 K and by Muon Spin Rotation (μSR), which is a probe of the local magnetic
environment inside the sample, over the temperature range 200 – 700 K. Results from SQUID were used
to model the temperature dependence of ferromagnetic and paramagnetic components of the bulk
magnetisation and, by extrapolation, to predict the Curie transition temperature. Results from μSR
confirmed the accuracy of the prediction to within 20 K. The Curie transition, which started at 528 K, was
shown to be spread over a wide ( 100 K) range. This was attributed to dependence of the transition on
particle size and the range of particle sizes in the population. A competing contribution to the overall
magnetisation was observed due to partial thermal decomposition of the organic component of the
material.
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China
78156840
Germany
2
Ireland
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Japan
1
Lithuania
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Palestinian Territories
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