High-temperature expansions for the susceptibility and the second correlation moment of the classical N-vector moel [O(N) symmetric Heisenberg model] on the sc and the bcc lattices are extended to order ${\mathrm{\beta }}^{19}$ for arbitrary N. For N=2,3,4. . . we present revised estimates of the critical parameters from newly computed coefficients.

• Received 9 March 1995

DOI:https://doi.org/10.1103/PhysRevB.52.6185