Field-Induced Transitions in RECo0.50Mn0.50O3 (RE = Dy, Eu)

A. B. Antunes (1) , Carlos Moure (2) , A. Moure (2) , Octavio Peña (3)

1 LNCMI-G - Laboratoire national des champs magnétiques intenses - Grenoble
2 Instituto de Ceramica y Vidrio
3 ISCR - Institut des Sciences Chimiques de Rennes

We have studied the magnetization at high magnetic field for bulk ceramic samples of EuCo0.50Mn0.50O3 and DyCo0.50Mn0.50O3 at low temperature. For the Dy sample we can see two field transitions (near 2 T and 5 T) and the magnetization measured at 20 T (6.7 μB) is near the expected value (M S =6.76 μB) if we consider a ferrimagnetic model of two sublattices fully aligned, one in opposition to the other. For the Eu sample we have five step transitions on the hysteresis curves (near 1; 3; 4; 5 and 6 T) and the measured magnetization at 20 T (2.6 μB) is lower than the expected value (M S =3.87 μB), suggesting this is a case of Van Vleck magnetism. Nickel-containing samples of similar composition have been measured but no field-induced anomaly has been found.

Mots clés: Manganites; Field-induced transition

Domaines: Matériaux

A. B. Antunes, Carlos Moure, A. Moure, Octavio Peña. Field-Induced Transitions in RECo0.50Mn0.50O3 (RE = Dy, Eu). Journal of Low Temperature Physics, 2010, 159 (1-2), pp.114-117. ⟨10.1007/s10909-009-0086-6⟩. ⟨hal-00832644⟩