Anomalies in the variation of elastic properties of cesium during phase transformations under a pressure up to 5 GPa |
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| Authors: | F F Voronov O V Stal’gorova E L Gromnitskaya |
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| Institution: | (1) Institute of High-Pressure Physics, Russian Academy of Sciences, Troitsk, Moscow oblast, 142190, Russia |
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| Abstract: | The pulsed ultrasonic method is used for studying polycrystalline cesium under a pressure up to 5 GPa. Elastic parameters and compression ratio of cesium are determined and anomalies in the elastic properties of cesium during phase transitions CsI-CsII-CsIII-CsIV are revealed. It is found that the CsII-CsIII electron-structure transformation is preceded by anomalous compressibility of the fcc phase of cesium and by softening of longitudinal and transverse acoustic modes of the cesium phonon spectrum. |
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