Pressure induced phase transition behaviour in f-electron based dialuminides |
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Authors: | P CH Sahu N V Chandra Shekar |
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Institution: | (1) Materials Science Division, Indira Gandhi Centre for Atomic Research, 603 102 Kalpakkam, India |
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Abstract: | The rare-earth and actinide based compounds are endowed with several exotic physical and chemical properties due to the presence
of f-electrons. These properties exhibit interesting changes under the action of various thermodynamic fields and hence continues
to be a subject of extensive research. For instance, under pressure, the nature of f-electrons can be changed from localized to itinerant, leading to a variety of changes in their structural, physical and chemical
properties. The present review on the high pressure phase transition behaviour of dialuminides of rare earths and actinides
is an outcome of research in our laboratory during the last five years using a unique combination of a Guinier diffractometer
and a diamond anvil cell built in-house. To bring out the correlations between the compressibility and structural behaviour
with the electronic structure, we have also carried out electronic structure calculation. Further, the usefulness of Villars’
three parameter structure maps in predicting pressure induced structural transitions has been explored and this has been illustrated
with the available phase transition data. |
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Keywords: | High pressure x-ray diffraction actinides and rare-earths dialuminides phase transition |
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