Abstract
This paper reports optical and magnetic properties of tetramethyl ammonium manganese trichloride, [N][Mn]. Magnetically, the system is one of very weakly interacting chains of ions. Magnetic-susceptibility measurements are given from room temperature to below 1°K and show a possible phase transition at 0.84°K. Theoretical analysis reveals that the system approximates very closely a Heisenberg linear-chain antiferromagnet with interchain interactions many orders of magnitude smaller than intrachain exchange . We find K and a susceptibility maximum at 55°K. The optical spectrum shows certain features that are not easily accounted for by an isolated Mn cluster, and may contain information concerning the nature of low-temperature dynamics of the Heisenberg linear chain, although no positive identification of magnon sidebands has yet been made.
- Received 5 May 1969
DOI:https://doi.org/10.1103/PhysRev.187.643
©1969 American Physical Society