Magnetic Properties of La_0.9Ag_0.1(Mn_1-xCo_x)O₃under Pressure

Abstract

Abstract. In our paper we report on magnetic properties of La 0.90 Ag 0.10 (Co x Mn 1-x )O 3 ferromagnetic ceramics (x = 0.00 and0.03) which were studied in pressures up to 0.9 GPa. Magnetic transition at the Curie temperature T C is accompanied with metal insulator transition with a maximum at T* which is shifted to lower temperature with applied magnetic field. The Curie temperature is decreasing with substitution of Co for Mn and is ranging from 178 K to 126.5 K. Hydrostatic pressure increases T C for sample with x = 0.03 nearly linearly with the pressure coefficient dT c /dp = 5.7 K/GPa. Hysteresis loop is affected marginally; µ s increases and H c decreases with pressure.