Abstract
AbstractThe temperature dependence of the elastic properties of polycrystalline manganite Pr1−xCaxMnO3 (0.5 ≤ x ≤ 0.85) has been studied systematically by means of ultrasonic measurements. It was found that the longitudinal modulus starts to soften obviously with decreasing temperature from higher temperature to the charge‐ordering transition temperature Tco, and stiffens dramatically just below Tco. The elastic anomalies observed near Tco cannot be explained based on a conventional antiferromagnetic transition. The electron–phonon coupling originating from the Jahn–Teller effect may play an important role in the system. The good fit of the theory to the temperature dependence of the elastic modulus data indicates that the mean‐field theory, which describes the coupling of Jahn–Teller ions to lattice distortions of the Jahn–Teller system, adequately characterizes the behavior. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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.
