<i>g</i>-Shift in Low Dimensional Antiferromagnets at Low Temperatures

Abstract

Anomalous g -shifts in low dimensional antiferromagnets, copper benzoate Cu(C 6 H 5 COO) 2 3H 2 O and copper tetra-amine sulfate Cu(NH 3 ) 4 SO 4 H 2 O (CTS) were observed mainly below 1 K. These compounds show positive g -shifts as temperature decreases. The results in copper benzoate are qualitatively explained by the theory recently developed by Nagata who introduced the one-dimensional short range order effect between inequivalent spins. The shifts in CTS are discussed from the two-dimensional point of view.