We investigate the structural and magnetic properties of two molecule-based magnets synthesized from the same starting components. Their different structural motifs promote contrasting exchange pathways and consequently lead to markedly different magnetic ground states. Through examination of their structural and magnetic properties we show that [Cu(pyz)(H2O)(gly)2](ClO4)2 may be considered a quasi-one-dimensional quantum Heisenberg antiferromagnet while the related compound [Cu(pyz)(gly)](ClO4), which is formed from dimers of antiferromagnetically interacting Cu2+ spins, remains disordered down to at least 0.03 K in zero field, but shows a field-temperature phase diagram reminiscent of that seen in materials showing a Bose-Einstein condensation of magnons.
@article{arxiv.1311.7614,
title = {Controlling magnetic order and quantum disorder in one- and zero-dimensional molecule-based magnets},
author = {T. Lancaster and P. A. Goddard and S. J. Blundell and F. R. Foronda and S. Ghannadzadeh and J. S. Möller and P. J. Baker and F. L. Pratt and C. Baines and L. Huang and J. Wosnitza and R. D. McDonald and K. A. Modic and J. Singleton and C. V. Topping and T. A. W. Beale and F. Xiao and J. A. Schlueter and R. D. Cabrera and K. E. Carreiro and H. E. Tran and J. L. Manson},
journal= {arXiv preprint arXiv:1311.7614},
year = {2015}
}
Comments
5 pages, 4 figures, supplemental information (6 pages, 2 figures) also included