Observation of the Curie Transition in Palladium Bionanomaterial Using Muon Spin Rotation Spectroscopy
Electronic Archive of Sumy State University
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Observation of the Curie Transition in Palladium Bionanomaterial Using Muon Spin Rotation Spectroscopy
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| Creator |
Creamer, N.J.
Macaskie, L.E. Mikheenko, P. Mikheenko, I.P. Cottrell, S.P. Williams, A.R. |
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| Subject |
Nanoparticles
Palladium Ferromagnetic Bacteria Muon Spin Rotation Spectroscopy |
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| Description |
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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| Publisher |
Sumy State University
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| Date |
2014-05-29T06:06:29Z
2014-05-29T06:06:29Z 2012 |
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| Type |
Article
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| Identifier |
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
http://essuir.sumdu.edu.ua/handle/123456789/35339 |
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| Language |
en
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