Physical properties of double perovskite compounds ALaVMoO(6) (A = Ca, Sr, Ba) - a possible half-metallic antiferromagnetic system

摘要

Double perovskite compounds ALaVMoO(6) (A = Ca, Sr, Ba) have been synthesized and their electrical and magnetic properties have been investigated. Magnetization measurements have indicated the possible antiferromagnetic transitions at 120 and 130 K for A = Ca and Sr samples, respectively. Electrical resistivity p for this system shows metallic temperature dependence from 300 to 20 K, though the sample with A Ca shows weak semiconducting behavior in the low temperature region (<70 K). Considering the magnetic and electrical properties and assuming the V3+ S = 1 and Mo4+ S = 1 valence and spin states, the samples with A = Ca and Sr can be promising candidates for half-metallic antiferromagnets. (C) 2003 Elsevier Ltd. All rights reserved. [References: 9]