Correlation between magnetic and transport properties of phase separated La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$

Abstract

The effect of low magnetic fields on the magnetic and electrical transport properties of polycrystalline samples of the phase separated compound La${}_{0.5}$Ca${}_{0.5}$MnO${}_3$ is studied. The results are interpreted in the framework of the field induced ferromagnetic fraction enlargement mechanism. A fraction expansion coefficient af, which relates the ferromagnetic fraction f with the applied field H, was obtained. A phenomenological model to understand the enlargement mechanism is worked out.

3 pages, 3 figures, presented at the Fifth LAW-MMM, to appear in Physica B, Minor changes