Acoustic properties of multiferroics PbFe1/2Ta1/2O3 and BiFeO3 at Néel temperature

  title={Acoustic properties of multiferroics PbFe1/2Ta1/2O3 and BiFeO3 at N{\'e}el temperature},
  author={Manfred Weihnacht and Andrey V Sotnikov and Hagen Schmidt and E. Smirnova and S. Ktitorov},
  journal={2011 International Symposium on Applications of Ferroelectrics (ISAF/PFM) and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials},
The longitudinal acoustic wave velocity and attenuation in PbFe<inf>1/2</inf>Ta<inf>1/2</inf>O<inf>3</inf> and BiFeO<inf>3</inf> ceramics have been measured by ultrasonic pulse-echo technique in the temperature range from 50 K to 530 K and from 250 K to 830K, respectively. The anomalies observed in the sound velocity behavior versus temperature in the case of PbFe<inf>1/2</inf>Ta<inf>1/2</inf>O<inf>3</inf> were correlated with Burns temperature and temperature range of relaxor ferroelectric and… CONTINUE READING
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