LARGE MAGNETOVOLUME EFFECT IN YTTRIUM DOPED LA-CA-MN-O PEROVSKITE

ac initial magnetic susceptibility, thermal expansion, and magnetostriction measurements were performed on a polycrystal of La0.60Y0.07Ca0.33MnO3 manganese oxide. We observed a spontaneous volume magnetic contribution (congruent to 1 X 10(-3) at T-C = 160 +/- 5 K). This extra contribution sharply decreases at T-C as a consequence of the metal (M)-insulator (I) transition, and is suppressed under an applied magnetic field. This shows that the transition to the M state is induced by the field in the I regime, producing strong magnetoelastic effects. The present results demonstrate the close relationship between magnetoelastic and magnetotransport properties in this compound.