Abstract
The longitudinal ultrasonic sound velocity and attenuation of single-phase polycrystalline compound La/sub 0.5/Ca/sub 0.5/MnO/sub 3/ have been measured by a conventional pulse-echo-overlap technique at a frequency of 10 MHz, between 77 K and 270 K. The effects of magnetic field on ultrasonic properties are also investigated. A dramatic stiffening in sound velocity coincided with big attenuation peaks observed near the charge-ordering transition temperature. Under an external magnetic field, the stiffening of the sound velocity shifts to lower temperature, and the attenuation peak was dramatically suppressed. This feature implies extremely strong spin-phonon and electron-phonon coupling originating in the Jahn-Teller effect.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
