Volume 86, Number 3, May 2009
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||20 May 2009|
Evidence for a temperature-driven structural transformation in liquid bismuth
Department of Materials Engineering, Ben Gurion University of the Negev - Beer-Sheva 84105, Israel
2 Department of Physics, NRCN - P.O. Box 9001, Beer-Sheva 84190, Israel
3 XSD and IPNS Divisions, Argonne National Laboratory - Argonne, IL, 60439, USA
4 Laboratoire Léon Brillouin (CEA-CNRS), CEA/Saclay - 91191 Gif-sur-Yvette cedex, France, EU
Corresponding author: firstname.lastname@example.org
Accepted: 8 April 2009
The thermodynamic properties of liquid bismuth have been explored from the melting point to 1100 °C by high-resolution measurements of the density, the heat capacity and the static structure factor. These physical properties display a number of anomalies. In particular, we have observed evidence for the presence of a temperature-driven liquid-liquid structural transformation that takes place at ambient pressure. The latter is characterized by a density discontinuity that occurs at 740 °C. Differential thermal analysis measurements revealed the endothermal nature of this transformation. A rearrangement of liquid bismuth structure was found by neutron diffraction measurements, supporting the existence of a liquid-liquid transformation far above the liquidus.
PACS: 61.25.Mv – Liquid metals and alloys / 64.70.Ja – Liquid-liquid transitions / 61.20.-p – Structure of liquids
© EPLA, 2009
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