Influence of magnetic field on paramagnetic-ferromagnetic transition in La${}_{1-x}$Ca${}_x$MnO${}_3$ ($x\approx 0.25$) crystal: ultrasonic and transport studies

B. I. Belevtsev, G. A. Zvyagina, K. R. Zhekov +6

The ultrasonic properties of La${}_{1-x}$Ca${}_x$MnO${}_3$ ($x\approx 0.25$) with the Curie temperature $T_C$ about 200 K are studied. Temperature dependences of longitudinal and tra…