Electronic structures and low-dimensional magnetic properties of the ordered rocksalt oxides Na3Cu2SbO6 and Na2Cu2TeO6

The ordered rocksalt-type oxide Na3Cu2SbO6 was synthesized and its magnetic properties were investigated. The broad peak in the temperature-dependent magnetic susceptibility data near 92K is indicative of the dominant low-dimensional short-range antiferromagnetic (AF) behavior. The data are very well fitted with the AF-AF alternating linear chain model with J1∕k=−79K and J2∕J1=0.39. The high-temperature data (T>300K) exhibit Curie-Weiss …