Structural analysis of a layered manganese tungstate diaminoalkane hybrid series suggests that this compound forms a spin-5/2 spin-ladder structure. We use X-ray diffraction, electron microscopy and x-ray absorption spectroscopy results to infer the structure. DC magnetization of the manganese compound and a possible copper analogue appear to show that the manganese system behaves like 1-dimensional antiferromagnetic Heisenberg chains (i.e. J∥≫J⊥) while the copper system is fitted well by a S=1/2 spin ladder model, giving the parameters g=1.920±0.008, J∥/kB=−0.3±1.4K; J⊥/kB=213.6±1.1K. The ability to tune adjacent inorganic layers of the hybrid materials by altering the length of the organic `spacer' molecules gives enormous promise for the use of these materials, especially when doped, to provide a greater understanding of spin ladder systems.
@article{arxiv.cond-mat/0505224,
title = {Novel organic-inorganic layered oxide with spin ladder structure},
author = {B. Ingham and J. L. Tallon and S. V. Chong and R. -S. Liu and L. -Y. Jang},
journal= {arXiv preprint arXiv:cond-mat/0505224},
year = {2007}
}