MAGNETIC-PROPERTIES OF BARU1-XRHXO3 AND SR2RU1-XRHXO4

The magnetic susceptibilities of polycrystalline BaRu1-xRhxO3 (x=1/3,1/2) and Sr2Ru1-xRhxO4 (x=1/2,2/3) have been measured as a function of temperature. In all cases hysteresis is apparent below ∼100 K, and the zero-field-cooled susceptibility of Sr2Ru1-xRhxO4 shows a maximum below 20 K. The data suggest an increase in the extent of electron localization in comparison with isostructural compounds (BaRuO3, Sr2RuO4, and Sr2RhO4), but there is no evidence for the weak ferromagnetism found in the Ir analogs (BaIrO3 and Sr2IrO4). © 1995 The American Physical Society.