• DocumentCode
    3229402
  • Title

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

  • Author

    Weihnacht, M. ; Sotnikov, A. ; Schmidt, H. ; Smirnova, E. ; Ktitorov, S.

  • Author_Institution
    IFW Dresden (Leibniz Inst. for Solid State & Mater. Res.), Dresden, Germany
  • fYear
    2011
  • fDate
    24-27 July 2011
  • Firstpage
    1
  • Lastpage
    4
  • Abstract
    The longitudinal acoustic wave velocity and attenuation in PbFe1/2Ta1/2O3 and BiFeO3 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 PbFe1/2Ta1/2O3 were correlated with Burns temperature and temperature range of relaxor ferroelectric and antiferromagnetic states coexistence. BiFeO3 demonstrates wide minimum of acoustic wave velocity at Neél temperature. Magnetostriction along with order parameter fluctuations are discussed as the factors determining the acoustic wave velocity anomaly in the vicinity of the antiferromagnetic phase transition point.
  • Keywords
    Neel temperature; acoustic wave absorption; acoustic wave velocity; antiferromagnetic materials; bismuth compounds; ferroelectric ceramics; iron compounds; lead compounds; magnetostriction; multiferroics; relaxor ferroelectrics; ultrasonic measurement; BiFeO3; Burns temperature; Neel temperature; PbFe0.5Ta0.5O3; acoustic properties; acoustic wave velocity anomaly; antiferromagnetic phase transition point; antiferromagnetic state; ceramics; longitudinal acoustic wave attenuation; longitudinal acoustic wave velocity; magnetostriction; multiferroics; order parameter fluctuations; relaxor ferroelectric state; sound velocity behavior; temperature 50 K to 830 K; ultrasonic pulse-echo technique; Acoustics; Heating; Magnetoacoustic effects; Temperature dependence; Temperature distribution; Temperature measurement; acoustic properties; magnetic ferroelectrics; multiferroics; relaxor ferroelectrics;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Applications of Ferroelectrics (ISAF/PFM), 2011 International Symposium on and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials
  • Conference_Location
    Vancouver, BC
  • Print_ISBN
    978-1-4577-1162-6
  • Electronic_ISBN
    978-1-4577-1161-9
  • Type

    conf

  • DOI
    10.1109/ISAF.2011.6014160
  • Filename
    6014160
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3229402