Elastic properties of relaxors with magnetic ordering

Author

Smirnova, E. ; Sotnikov, A. ; Ktitorov, S. ; Zaitseva, N. ; Schmidt, Heidemarie ; Weihnacht, M.

Author_Institution

Ioffe Phys.-Tech. Inst., St. Petersburg, Russia

fYear

2012

fDate

7-10 Oct. 2012

Firstpage

1

Lastpage

4

Abstract

The longitudinal and transverse acoustic wave velocities in PbFe_xB_1-xO₃ (B = Ta, Nb, W) ceramics have been measured by the ultrasonic pulse-echo technique at a frequency of 10 MHz in a wide temperature range from 4.2 K to 500 K. Temperature dependences of the longitudinal and transverse elastic constants were obtained. The softening of the elastic coefficients at phase transitions is discussed within the framework of the phenomenological theory taking into account electrostrictive and magnetostrictive couplings.

Keywords

acoustic pulses; acoustic wave velocity; ceramics; elastic constants; electrostriction; iron compounds; lead compounds; magnetostriction; relaxor ferroelectrics; ultrasonic materials testing; ultrasonic measurement; PbFe_xB_1-xO₃ ceramics; PbFe_xNb_1-xO₃; PbFe_xTa_1-xO₃; PbFe_xW_1-xO₃; elastic coefficient softening; elastic properties; electrostrictive couplings; frequency 10 MHz; longitudinal acoustic wave velocity; longitudinal elastic constants; magnetic ordering; magnetostrictive couplings; phase transitions; phenomenological theory; relaxors; temperature 4.2 K to 500 K; transverse acoustic wave velocity; transverse elastic constants; ultrasonic pulse-echo technique; Acoustics; Magnetoacoustic effects; Magnetostriction; Temperature dependence; Temperature distribution; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2012 IEEE International

Conference_Location

Dresden

ISSN

1948-5719

Print_ISBN

978-1-4673-4561-3

Type

conf

DOI

10.1109/ULTSYM.2012.0373

Filename

6562165