Abstract
The highest and lowest energies as a function of the total spin are computed for the class of "unbound" states in the Bethe formalism for the linear chain of spin-½ atoms with a Heisenberg exchange interaction between nearest neighbors. The lowest energies are used to compute the magnetization curve for the infinite antiferromagnetic chain in the limit of zero temperature. At zero temperature and in zero field, the magnetic susceptibility has the value 0.050661 , where is the Bohr magneton, the electron factor, and the interaction between neighboring spins is of the form .
- Received 9 September 1963
DOI:https://doi.org/10.1103/PhysRev.133.A768
©1964 American Physical Society