Ultrasonic behaviours near different phase transitions in La1-xCaxMnO3

  title={Ultrasonic behaviours near different phase transitions in La1-xCaxMnO3},
  author={Changfei Zhu and Renkui Zheng and Jinrui Su and Wenhai Shong},
The ultrasonic longitudinal and transverse sound velocities in the single-phase polycrystalline compound La1-x Cax MnO3 (x = 0.33, 0.63, 0.73, 0.83) have been measured by a conventional pulse-echo-overlap technique at a frequency of 10 MHz, between 50 K and 300 K. Dramatic anomalies in sound velocity for both longitudinal and transverse modes were observed near the temperature of the ferromagnetic transition (TC ), charge-ordering transition (TCO ), and antiferromagnetic transition (TN ). The… CONTINUE READING