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首页> 外文期刊>Review of Scientific Instruments >Photoacoustic determination of phase transition in BaTiO3 induced by high pressure at room temperature
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Photoacoustic determination of phase transition in BaTiO3 induced by high pressure at room temperature

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The high-pressure behavior of BaTiO3 was investigated by the photoacoustic technique in a diamond anvil cell at room temperature up to 3 GPa. Only one phase transition was observed with an increase in pressure: BaTiO3 tetragonal-->cubic. The phase transition induced by high pressure was detected by sequential measurements of photoacoustic signals generated by short laser pulses applied to the diamond front face for each pressure applied. A correlation analysis of the photoacoustic data signal sequence values clearly shows a phase transition within an uncertainty of +/-5. (C) 2003 American Institute of Physics. References: 10

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