Title

The Jahn–Teller effect and electron–phonon interaction in La0.25Ca0.75Mn1−xCrxO3

Document Type

Article

Publication Date

6-2001

Abstract

The ultrasonic (longitudinal and transverse) velocities and the transport and magnetic properties of polycrystalline La0.25Ca0.75Mn1-xCrxO3 (x = 0, 0.03, 0.05, and 0.07) have been studied systematically. It was found that with increasing Cr content, the resistivity increases, the charge-ordering transition temperature TCO shifts to low temperature, and the magnetic moment of the system is strengthened. From the temperature dependence of the ultrasonic velocities, one can establish that the Jahn-Teller energy and phonon exchange constant decrease with increasing Cr content.

Comments

Open access to this article is provided by the National High Magnetic Field Laboratory at Florida State University at http://www.magnet.fsu.edu/library/publications/NHMFL_Publication-2979.pdf.

Copyright 2001 National High Magnetic Field Laboratory. Posted with permission.