We have synthesized and characterized a new spin-1/2 Heisenberg antiferromagnetic ladder: bis 5-iodo-2-aminopyridinium tetrabromocuprate(II) dihydrate. X-ray diffraction studies show the structure of the compound to consist of well isolated stacked ladders and the interaction between the Cu(2+) atoms to be due to direct Br...Br contacts. Magnetic susceptibility and magnetization studies show the compound to be in the strong-coupling limit, with the interaction along the rungs (J' ~ 13 K) much greater than the interaction along the rails (J ~ 1 K). Magnetic critical fields are observed near 8.3 T and 10.4 T, respectively, establishing the existence of the energy gap.
@article{arxiv.cond-mat/0011016,
title = {Magnetic properties of a new molecular-based spin-ladder system: (5IAP)2CuBr4*2H2O},
author = {C. P. Landee and M. M. Turnbull and C. Galeriu and J. Giantsidis and F. M. Woodward},
journal= {arXiv preprint arXiv:cond-mat/0011016},
year = {2009}
}
Comments
10 pages, 4 figures, submitted to Phys. Rev. B Figure 4 did not print. *.eps files replaced with figures.ps file