Abstract
Measurements of the proton spin-lattice relaxation rate, , reveal that the organic insulator copper phthalocyanine Cu(PC) is a highly one-dimensional Heisenberg system. diverges as down to 11.4 MHz without evidence of cutoff. It was found that ‖J/‖=0.286 K with the ratio ‖J/J’‖≥6×, where J and J’ are the intrachain and interchain exchange interactions, indicating that Cu(PC) is an excellent model one-dimensional Heisenberg magnet.
- Received 21 August 1986
DOI:https://doi.org/10.1103/PhysRevB.35.5003
©1987 American Physical Society